SS_TIMESOURCE_SELF_INTERNAL

Dear all, I've just noticed that there is an undocumented, misterious SS_TIMESOURCE_SELF_INTERNAL option for ssSetTimeSource, which might as well be exactly what I need to tackle a problem (see my "nested simulation" message earlier today). Someone knows what is that good for and how to use it? Thanks in advance for any pointers. Cheers, Jorge.

Question about RandStream.

Just started to learn about RandStream (the new way to generate uniform or normal random numbers). RandStream is a handle class and I get a bit confused about that. I am a bit behind on learning the new Matlab OOP. I am pretty comfortable with value class but not with handle class. For example, function foo h = RandStream('mt19937ar'); end Everytime I call this function, does Matlab create an instance of RandStream (i.e. allocate memory) and then delete the instance (i.e. free memory)? So after the function returns, I won't have access to the object created inside foo( ). Righ

how read this file ?

Hi, I would like to import data from a file. But I don't know how to do and especially the datum and the number (. and ,) 23.12.2009 20:30:00.000 3.916,5 3.917,3 3.915,0 3.917,0 23.12.2009 20:40:00.000 3.917,0 3.920,0 3.916,8 3.918,3 I would like to obtain a datum from the two first columns that can be plot as a X-axis. Regarding the number, how can we deal with the . and the , which is not the right way to encode data in Matlab ? Thank you in advance. Best regards, Matthieu

Including user created Toolboxes in compile

hey everyone, I'm working on a number of applications, each in their own directory, but all use a shared directory of tools (mostly programs downloaded from File Exchange). I'm also compiling these applications individually. How do I include the path of the shared directory in the compile? For example: Tool 1 dir : \\server\Tool1 Tool 2 dir : \\server\Tool2 Tool 3 dir : \\server\Tool3 Shared dir : \\server\sharedtoolbox\ in each file I have the line: if ~isdeployed addpath('\\server\sharedtoolbox\') else %what should I put here? end Thanks Jason

Sliding window implementation and exceer variable size

Hi folks, I want to implement a sliding window to extract information from an image, my implementation is i use a for loop that is shifted by 1 pixel at the time to go over all the image and save the values in a matrix (WindowX,WindowY,NumberOfWindows). Two problem arose, 1- it is very slow 2- as the size of the image increases, the number of extracted windows increases hene increases the matrix size and get the erro ??? Maximum variable size allowed by the program is exceeded. Below is my implemetation %Moving Window zgray=1000*rand(500,500); % Assume

how to modifly the random number generator

I have created a simple system which generates 2 random numbers that always add to 1. I did this by using 2 uniform random number generators and an adder which sums the results together. I took the sum and ran it into 2 dividers so that each divider was dividing the original random number by the sum of the 2 random numbers to get 2 random numbers that add to one. I hooked a scope up to the dividers and realized I was not getting a single random number. This random number generator is a subsystem of a bigger system which can only use 1 value. I'm wondering if the random number generator is

Differences in XML File generated in Matlab vs Outside Matlab

Hi, I have a java class, which generates the XML file. I am using the same class in both Matlab session and in Eclipse. Following is the code I am using to genate the XML file public static void saveDocument(Document doc, File file) throws Exception { DOMSource source = new DOMSource(doc); OutputStream stream = new FileOutputStream(file); StreamResult result = new StreamResult(stream); Transformer transformer = TransformerFactory.newInstance().newTransformer(); transformer.setOutputProperty(OutputKeys.INDENT, "yes"); transformer.setOutputProper

Y axis plot labeling? Want auto scaling, but want to format...

Hi there, I have a series of graphs that are created in batches (up to 400) by a Matlab .m script. The y-axis values can range from less than +/- 2000 to over +/- 5000000. The Matlab auto labeling works well for small numbers (> +/-10,000) but any higher and it starts to plot the y-axis labels as (for example) -2.5, -1.25, 0, 1.25, 2.5 with a x10^4 label at the top of the plot. I need to avoid this labeling, and need real integers plotted along the y-axis. Is there any way I can over-ride the auto labeling that Matlab puts out? I also want the top-most YLabel and bottom-most YLabel to h

need help on tree plotting

I am trying to plot a tree where some nodes have more than one 'parent' node. Function treeplot apparently can not do this work. Any suggestion is welcome. Thanks.

how to set current zoom setting for next execution?

hi! I'm quit new to matlab. I really hope that someone can help me. I have a little bit problem on zoom for images. After I zoom a certain area on the images, how do I keep the current setting of zoom that need to be used for the next execution? I already tried hold, wait and resume. But the images will still returned back to its original image setting(before zoom) thank u so much in advance!!!

Software running slow

hi everyone, I have a function that, accordingly to the profile report, slows down my whole program. Here is the profile report: ------------------------------------------------------------------------------------------------------------------- time calls line 1 function A_star_par = heap_link_A_Star(A_star_par,y,x) 2 3 % remove y from the root list of A_star_par.openset 0.03 107481 4 left_node = A_star_par.left(y); 0.05 107481 5 right_node = A_star_par.right(y);

Freeman chain code

How to use freeman chain code in matlab? Thanks

Multiple equitions and multiple variables with boundaries

Hi, I'm a beginner with MatLab and I have to solve a rather tricky problem. I have created 6 functions, which all depend on 5 variables, of which for two I have found a relation, so actually there are 4. But those 4 variables do have boundaries. The boundaries given are: Lc : 0.25 < Lc < 0.30 Ro: Ro < 0.05 Ri: Ri = 0.577*Ro Dc: no boundaries What I am looking for is the ultimate combination of these variables, within the boundaries specified. However, besides the boundaries of the variables, there are other restrictionst: REax < 2000 REtan < 108 atan(tanA): 0 < atan(tanA) < 0.

Function help

An item in the cell array ca could be a numeric vector, a string representing a number, or another cell array containing numeric vector or strings. The function returns the total sum s of all the numerical values in all formats, and the total number n of values in the cell array. A sample run of the function is shown below. >>ca = {[2 5] '0.5' {'3', [1 8]}, 7} ca = [1 X 2 double] '0.5' {1 X 2 cell} [7] >> [s n] = project8(ca) s = 26.5000 n = 7 This is what I have so far...not getting too far... function [s n] = project8(ca) s=0; n=0; for s={} s = sum(c

tsearch and DelaunayTri

Hi All, I'm trying to update my code for future the future. I have my own triangulation source that returns the connections TRI for the points X,Y. In the past I used tsearch to find the triangles that contained the points. My problem now with 2010a is: TSEARCH will be removed in a future release. Use DelaunayTri/pointLocation instead. I'm relatively new to OOP in MATLAB. I tried the following: >> TR = DelaunayTri(); >> TR.X = [X Y]; >> TR.triangulation = TRI; ??? Error using ==> subsasgn Cannot assign values to the Triangulation. I take it this means that triangula

Creating a spline from a list of points and calculating the tangents to it

Hi, I'm trying to create a spline from a set of points which form a closed contour and calculate the tangents and normals to the curve at its break points. I've got some code which does most of the work, but I don't understand where its failing. My code just comprises of a few lines, please have a look: %%%%%%%%%%%%%%%%%%%%%%%%%%%%%% spline = cscvn(I1_coords); break_coords = fnval(spline, spline.breaks); xPts = break_coords(1,:); yPts= break_coords(2,:); pts = fnval(spline, xPts); tangent = fnval(fnder(spline), xPts); quiver(pts(1,:), pts(2,:), tangent(1,:), tangent(2,:))

Manova theory & calculations?

Hi, there is some info. about Manova given in Matlab help but it is not told how the values of wilks lambda, sum of squares etc. are calculated. Does anyone know a good article on Manova where I could read the method behind it. Thanks

Line numbers on mfile text when printing from editor

When I am editing a mfile in the editor and need to print it out, is there any way to include the line numbers on the printout? I could use >> dbtype <mfile> but that would lose the color formatting (comments etc) which I'd like to keep.

3D object in 3D space

Dear all, I have xyz coordinates for my 3D object, however, I am not sure how to use this information to visualise it. Thank you very much for your help! Anna

how to plot a graph

I want a force vs time graph at the beginning of my model, so i the force can vary over time (user can change). How do i plot this graph so i can connect the output to a product function?

N-dimensional indexing allowed for Full matrices only

Hi everybody, I -think- I have an error message induced by the installation of R2010a (not completely sure, but at the moment I see no other possible explanation). I get "N-dimensional indexing allowed for Full matrices only" with such a statement structure for i=1:n_row for j= 1:n_col rfm(1,i,j)=data(i+1,j+1); end end where "data" is a sparse matrix This part of the application is not written by me, and it used to work until the installation of R2010a, that I did today. Can this be the reason? I guess that the rfm matrix does not like to be s

Error importing excel

I've got a problem using matlab R2009b. We have to make tutorials to learn the program matlab. At our Universaty we use 'R2008b'. We have an assigment to import data (excel file). In 2008 it works fine, but in 2009 I can't seem to get the data. If I click on the file I come into the 'import wizard' screen but there is no data.... That is straings because in 2008 I DO see data. Is this a bug in 2009 or in x64 version of 2009? I use R2008 x64 and R2009 x64 Regards Daniel

Extracting data from another M file

Hi guys (and gals), Just a quick question, basically i have this M file that does some calculation and outputs value in a variable called u(t,r). Note the values are indexed. Now, in a seperate M file, i want to call the previous M file to get values of u(t,r). How would i be able to do so? Any help appreciated. Thanks! Regards, Wen Zhe

cell array,for loop

Dear all: I really need help. So I post it again, because the first post is too messy, so I delete some statement in this version. I can run an iteration below well, n=length(c{1}-1); decay=ones(n,3); for i=1:n k=c{1}(i,3); x=cT{1}(k:k+1000,1); Y=cT{1}(k:k+1000,2); end But after I put the iteration above into another iteration below, it doesn't. The problem is 'x=...; Y=...' sentence below: for j=1:5 n=length(c{j}-1); decay=ones(n,3); for i=1:n k=c{j}(i,3); x=cT{j}(k:k+1000,1); Y=cT{j}(k:k+1000,2); end end A

Surface Roughness Modelling

Hi all i am working on surface roughness models. the objective is to convert surface roughness data obtained from metrology instrument; contact profilometer to create the finite element model. how i can correct planar misalignment(between instrument and specimen) in matlab once data has been imported. can anyone explain me how to do it or someone has m-file regarding this type of models. your support will b highly appreciated

Image analysis: point regrouping

Hi! My problem sound pretty simple (to me), but I am not quite sure how to tackle it. My overall goal is segmentation of 3d images (cells). I have been using a gradient flow tracking approach, which leaves a "sink" at the center of each cell. I have labeled this sink in the sink matrix. Because my images are not perfect though, I tend to have more than one sink per cell, leading to my program thinking that one object is actually multiple objects. What I want to do is cluster all points in the sink matrix (that are over 0) that are within a certain distance from one another and relabe

Documenting object-oriented MATLAB code

I'm writing a sizeable application using object-oriented MATLAB, and this has gotten me thinking about how to document the code. If this was C, I would use Doxygen. For Java, I'd use JavaDoc. Both have mostly agreed-upon standards for how class and method documentation should look and what it should contain. But what about MATLAB code? The most I've seen in TMW's own classes is a short sentence or two at the top of the class, and I can't find any topics devoted to documenting sizeable MATLAB applications. So how do you document your MATLAB classes? Any particular style issues or addition

calculate radius

i can not find radius in each circle please help me. thank you for you kindness. my pic http://www.uppicweb.com/x/i/iv/img_and.jpg please help ...T_T

Select a ROI based on the centroid of round object

Hi, I have a round object in an image. How can I select a region based on the centroid of the object? The region I need is flexible,it can be a sector of the circle or a triangle of the circle's sector. I just need it to determine whether it is the desired color. Also, can I know the steps to determine whether the selected region is yellow or white color? Thanks in advance.Appreciate the help!

GUI, timer, handles

Hi, I have a problem updating GUI handles with timer... In the OpeningFcn of my GUI I have the following instructions: handles.data.timerReadSerial = timer('TimerFcn', @(obj, event) readSerial(obj, event, hObject), 'ExecutionMode', 'fixedRate', 'Period', 1, 'BusyMode', 'drop'); The function readSerial is the following function readSerial(obj, event, hObject) handles = guidata(hObject); % I try to retrieve updated handles with this % other stuff not important here I have a pushbutton that let me start the timer with start(handles.data.timerReadSerial); and another pushbutton

rearrange equations to matrix form

I want to rearrange several equations to matrix form using a Matlab function. The equations are in symbolic form. For example: Let y1=a1*x1+b1*x2+c1*x3 y2=a2*x1+b2*x2+c2*x3 y3=a3*x1+b3*x2+c3*x3 which is to be rearranged to a form of y=H*X where y=[y1 ; y2 ; y3] H=[a1 b1 c1; a2 b2 c2 ; a3 b3 c3] and X=[x1 ; x2 ; x3] How can I generate the matrix H without doing it manually? (matix X is self defined). The example in this case is simple thus manual rearrangement is not time consuming. I want to know whether there will be a matlab function to perform such rearrangement process fo

hiding text in an mfile

Hi everybody, when using the for-loop matlab lets you hide the content of the loop by clicking the sqaure whith a minus sign on the left side of the "for". is there a way to set this trick to hide text so the mfile looks smaller?. what I do, is to set for loops that dont do anything to be able to hide the text, but I guess there is a more elegant way to do this. thanx in advance

Statistics on nonequally spaced data in 2D

I have a large number of data points n(x,y,z,t) where n is the refractive index and the data is produced by a Large Eddy Simulation model (a type of CFD-calculation). The simulation was performed on a cluster and the results dumped to file. I am now doing post-processing of the data. I know that the time average should be cylindrically symmetric and would thus want to calculate ñ(rho,z) and n_var(rho,z), where I mean average with ñ and variance with n_var. The time series is not long enough for ñ(x,y,z) to look symmetric. The grid has structure but is not rectangular or symmetric. There are ap

dataset training

Hello, how to train the dataset (.mat format) .i.e connected to matlab from oracle using odbc. could anyone please tell how to train dataset since im new to matlab.

RS422 in xPC Target: Problem with ASCII Encode and Decode

Hello! I am using Quatech QSC-200/300 Card to send and receive data from EuroTherm 808 Temperature Controller. Strings are as follows: Computer send: (EOT) (Group ID) (Unit ID) (C1) (C2) (ENQ) Controller reply: (STX) (C1) (C2) (D1) (D2) (D3) (D4) (D5) (ETX) where (Group ID) and (Unit ID): 00-99 (C1) (C2) is parameter specified by mnemonic, ex: P V,S V... (D1..D5): value of the requested parameter How can I format the above strings in ASCII Encode, Decode and FIFO Read HDRS blocks? I have tried to use the following formats but I only received 0: + ASCII Encode block: EOT %d

summing vector and matrix

a=rand(50,1); b=rand(50,70); c=rand(70,1); K=5; frame_size=length(a)/K; total=(a-b*c)'*(a-b*c); But I want to compute the total for each frame using this size:(frame_size) as above and summing it all together and get the same answer as total. I know we can compute all together as total=a-b*c but I want to divide the vector a and matrix b for K frames and compute each frame and summing it all together. that means each frame will have 10x1 with different values for K frames. I know how to sum for fixed input but I want to use it for any size of a, b and c. Thanks in advance.

matrix operation

how to transfer elements from one matrix to other in place of zeros. Both matrix have different dimensins eg:a=[1 2 4 3 0 3 4 0 4 0 0 5 6 7 6 8] b=[1 2 3 4] fill the elements of b to a in place of zeros

A Limitation of the Distributed Computing Toolbox?

I'm in the process of setting up a small experimental cluster using two quad-core i7 PCs. This means that (including hyper-threading) I am theoretically allowed to run 8 concurrent threads (workers) per machine. All is well and good so along as I stick to running the processes on one machine (matlabpool 8) The problems arise when I try combining the two machines. Using the Admin Centre tool I set-up JobManager-A on Machine-A which also has 8 workers assigned to it. Then I assigned a set of 8 workers running on Machine-B to the same JobManager-A. So at this point the JobManager reassuring

Anyone recognize these Lagrange coefficients?

I need experts eyes for this set of coefficients. I am new at this whole Fractional Delay Filter @ Farrow and Lagrange Interpolation. So any help will be much appreciated, especially with many MATLAB pros and elite mathematicians here. The reason why I wanted desperately for this set is because I see it being used in various examples (in books, websites, and MATLAB help file), but the source of prior approximation was never given. I want to see if I can shadow their process from beginning to end. I learn better that way! This mysterious set of coefficient can be found in Matlab DSP toolb

Unlock library over m-script

Hello dear Users, How unlock the library in Simulink over a Matlab M-Script? it is the same as in Simulink GUI: Edit -> Unlock Library how do I get it with m-code? set_param(gcs, '....') Tahnks alot for your help!

How to use Matlab in voice recognition

Hi.. I'm a new use to matlab.. And I'm doing a project which is required voice recognition or comparison. I heard that the matlab software can be used on that. But the problem is I don't know how to use it.. I don't know about the matlab functions. If there's any one who's capable of help me.. please please.. send me the procedure and advices.. .. e-mail= wattale@gmail.com

Batch job

hello, i have a large file that i'm working with, so i devided it to several shorter files. i want that while i'm working on one file, the next file will get uploaded in the background of matlab in a way that it won't disturbe the user to work meanwhile. i know the batch('script') can do that, but i'm having trouble in using it. can anyone explain me how to use it? or does anyone has another idea for how to do what i want? the code i used: next_epoch_dir=[File{2} File_Name '\']; next_epoch_name=next_data{2}; j=batch('load_next'); load_next: data=load([next_epoch_dir ne

2 surf plots in one diagram

Dear community, Is it possible to have two surfaces in one diagram. And if so, how do I do it? And how do I add a label? Example: Z=randn(11,11); Z1=randn(11,11)+2; X=[1:11]; Y=[1:11]; surf(X,Y,Z) surf(X,Y,Z1) But now in one diagram? Thanks in advance, kind regards Hans

how to create mask

Hi, I have a region (say: in a matrix X=[250 52]),then I want to mask some area that I'm not interested in my analysis e.g. one area (60,2) to (60,7) and (90,2) to (90,7), how to do that in matlab? and what if I have more than one area to be masked? thanks ysf

two's complement 8 bit data to decimal

Hi guys, does anyone knows how to convert a 8-bit data in the two's complement format back to signed decimal number? Thanks, AL

how to write serial port

hi, I am working on the project image processing based part inspection system.For that i need to send +5V signal from serial port.I have written the program for that in matlab as given below.But i didn't get the proper output. s=serial('COM1'); fopen(s); fwrite(s,11111111,'ulong','async'); stopasync(s); fclose(s); I am measuring the voltage change in serial port by digital multimeter at the time of running the prog.But i get -11.27V normally and when i run the prog,i got -11.29V.that means only a minor change of -0.02V and that also in negative direction.While ideally i should get 0V

Simple function script errors

I am a beginner to MATLAB and am using it for my Vibrations class I am calling a function shown below with the script shown below. Newmark Beta integration method where I plot the time (t) verses displacement (v) using different values for dt to show what size dt I need to use to have a converging graph. %Below is the function function[v, dv, ddv]=newmark1(m, c, k, t, dt, fn, v0, dv0, ddv0) % INPUTS % v0, dv0, ddv0: initial conditions % dt: time step % t: vector of time points % f: forcing function vector % m: mass (kg) % c: damping constant (Ns/m) % k: spring constant % OUTP

Discete PID controller

Hi, I'm trying to create a discreet PID controller. I'm new at this software, and I don't know where everything is. I know there's a linear PID controller icon, but it won't let me make any changes. Thank you very much for the help.

How to simulate a serial com output

I use matlab to generate real-time data and want the real-time data can be obtained at my PC's serial port com 2. A serial cable connected at com 2 gets the data as if the matlab virtual serial output is the real serial output. How can I do this? Anybody has the experience? Thanks a lot. Roy

fwrite error with doubles

hello, i am running the code below and when i inspect the txt file later on it is indecipherable and is not able to be read back in when i use fread. the data in the matrix is of class "double", and i am attempting to also write to double. not sure what is causing this. thank you!! see code below for two tries i gave neither of which worked ::::: [fid,message]=fopen(strcat('/Users/Jason/Desktop/ folder/',Tick_Hold,'/',TS(1,j).filename{1,i},'.txt'),'a'); fwrite(fid,TS(1,j).ts(i,:),'double'); fclose(fid); [fid,message]=fopen(strcat('/Users/Jason/Desktop/ fo