hello am trying to create new unit step and unit ramp function using matlab language and use them to get a plot for a specific equation i have created the the code below but still getting some errors that i cannot identify.. function k=step(t) k = t>=0; function k = ramp(t) if t >= 0 k=t; else t<0 k=0; end t=-5:5; f = zeros(size(t)); for x = 1:length(t) f(t)= (5*ramp(t+3))- ramp(t+1) - (3.*ramp(t))+ (5*ramp(t-1)) + (3*step(t-2)); end plot(t,f) anyone can help please? thanks in advance

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12/22/2010 8:11:20 PM

On 10-12-22 02:11 PM, kailatzakis wrote: > hello am trying to create new unit step and unit ramp function using matlab > language and use them to get a plot for a specific equation > i have created the the code below but still getting some errors that i cannot > identify.. > > function k=step(t) > > k = t>=0; > > function k = ramp(t) > > if t >= 0 k=t; > else > t<0 > k=0; > end > > t=-5:5; > > f = zeros(size(t)); > > for x = 1:length(t) > f(t)= (5*ramp(t+3))- ramp(t+1) - (3.*ramp(t))+ (5*ramp(t-1)) + (3*step(t-2)); > > end > > > plot(t,f) > > anyone can help please? Change the assignment from f(t) on the left hand side to f(x) on the left hand side. Also, I would point out that your ramp function is equivalent to max(0,t) . If you were to change it to that, then both step() and ramp() would be vectorized and you would then not need a loop to calculate your f.

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12/22/2010 8:42:48 PM

"kailatzakis " <pns2050@yahoo.com> wrote in message <ietm18$j2n$1@fred.mathworks.com>... > hello am trying to create new unit step and unit ramp function using matlab language and use them to get a plot for a specific equation > > i have created the the code below but still getting some errors that i cannot identify.. > > function k=step(t) > > k = t>=0; > > function k = ramp(t) > > if t >= 0 > k=t; > else > t<0 > k=0; > end > > t=-5:5; > > f = zeros(size(t)); > > for x = 1:length(t) > > f(x)= (5*ramp(t+3))- ramp(t+1) - (3.*ramp(t))+ (5*ramp(t-1)) + (3*step(t-2)); > > > end > > > plot(t,f) > > anyone can help please? > > thanks in advance yes i identified this mistake but still getting this error .. ??? In an assignment A(I) = B, the number of elements in B and I must be the same. Error in ==> rampstep at 7 f(x)= (5.*ramp(t+3))- ramp(t+1) - (3.*ramp(t))+ (5.*ramp(t-1)) + (3.*step(t-2));

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12/22/2010 8:54:07 PM

On 10-12-22 02:54 PM, kailatzakis wrote: > yes i identified this mistake but still getting this error .. > > ??? In an assignment A(I) = B, the number of elements in B and > I must be the same. > > Error in ==> rampstep at 7 > f(x)= (5.*ramp(t+3))- ramp(t+1) - (3.*ramp(t))+ (5.*ramp(t-1)) + > (3.*step(t-2)); All the "t" on the right hand side should be "x".

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12/22/2010 9:04:17 PM

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Would someone be able to help me with this. I have been trying to get this code going and at one time long time ago it worked. Now it doesnt after reinstall of matlab. Can someone give me some guidance as to how I can make this code work again. Thanks. function [u] =step(t) % unit step function % for all t less than 0 make u = 0 % for all t greater than or equal to 0 make u = 1 u = zeros(size(t)); % zero fill size of t, zero fill=(t_upper_lim-t_lower_lim)/0.001 u(find((t)>=0))=1; %return indices of elements of t >=0 that and sets them to 1 THIS IS THE ERROR MESSAGE ?? Inp...

Part of the object hierarchy in my program seems like this, 1, A manager class (the largest unit), it contains a list of the atom units and some global information needed by the atom units. 2, An atom class list which is a bridge of the manager and the atom. 3, Atom class (the smallest unit). The atom class logical is reasonably simple and independent, so major part of it can be test without trouble. However, some parts of the atom class require informations from the manager class. Those informations are global, and some informations are only available during certain session such as the user ...

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The break function only takes you out of a single for loop. Suppose one has two for loops and one if with an else statement which contains a break.How does one get out of both 'for' loops with one statement??? e.g. xe=10; for k=1:10 for f=1:7 xe=xe+k xe2=xe+f if xe<=20 display('1on'); else break break end end end Obviously this does not work.Any ideas before i do this: xe=10; for k=1:10 for f=1:7 xe=xe+k xe2=xe+f test=1; if xe<=20 display(&...

I use lisp-unit and so far I was pleased with it. In order to refactor a big chunk of code I decided to write some tests. I have written a function called loader-data, which works fine in repl. However when I run (run-tests :all) SBCL runs out of heap and I get an error. I'm a Lisp noob, so the problem likely lies with my code. Depending on the code in test heap is exhausted every first time I run the test, or after repeatedly running the same test. I was running my function directly in repl over and over again and didn't notice such behaviour. Do you have any idea ho...

I would, personally, use the occurance approach. In the DLL have a callback to get notified of when the progressbar needs to be adjusted. In this callback use an occurance to tell LabVIEW the new values ready to be read. Also have a helper (reader) function that LabVIEW can call to get the most current value... Basically every time the LabVIEW occurance is triggered call the DLL for the new value. To me this seems the easiest way. Oooo, new forum message interface! I like it! :robottongue: <--- First robo...

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On Thu, 1 Jun 2006 19:01:23 -0700, skyline <carf4F@GMAIL.COM> wrote: >Hello, > >I would like to print the results at each step of the program to make >sure that >the results are correct. For example > >data data1; >set data1; >variable1=variable1+1; >run; > >proc print data=data1; >title ''; >run; > >data data1; >set data1; >variable2=variable1+1; >proc print data=data1; >run; > >when I have many steps like this, it is not always easy to read the lst >file to see which outputs are from which proc print. Is ther...

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I tried to build a CThread on linux which imitate the behavior of java Thread. I think this is still in the scope of C++. First, I tried this way #include <pthread.h> class CThread { public: void start(); void run(); private: void * threadProc(void *data); pthread_t m_tid; }; void CThread::start() { pthread_create(&m_tid, NULL, this->threadProc, NULL) } void CThread::run() { //do nothing } void * CThread::threadProc(void *data) { run(); } User shall create a subclss of CThread and override the function run(). But when I compile it, the compiler says: cannot convert `v...

Hi, I'm looking for some advice on programming style ... is is considered bad practice to die within your own functions as opposed to using a bare return statement? What about displaying error messages within perl functions, is this frowned (as it tends to be in unix systems programming) upon? Cheers, Stevens X-Ftn-To: Stevens "Stevens" <auto87829@hushmail.com> wrote: >I'm looking for some advice on programming style ... is is considered bad >practice to die within your own functions as opposed to using a bare return >statement? What about displaying ...

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If I have r=0:.2:10; z=bessel(0,x); I get a 1D bessel function How can I sweep this function through 360 deg to produce a 2D function (that would look something like a sombrero in this case) Do I need to define a theta vector from 0:360, then convert from polar coords to x,y using x=r*cos(theta) y=r*sin(theta) When I do that, the points don't lie on a nice grid... Any help would be apprciated. Thanks. -Steve In article <1133458472.393210.314280@g14g2000cwa.googlegroups.com>, "Steve" <srjm72499@frontiernet.net> wrote: > If I have > > r=0:.2:10; >...