f

Triple nested loop python (While loop insde of for loop inside of while loop)

```try to make my triple nested loop working. My code would be:
c = 4
y1 = []
m1 = []
std1 = []
while c <24:
c = c + 1
a = []
f.seek(0,0)
for columns in ( raw.strip().split() for raw in f ):
a.append(columns[c])
x = np.array(a, float)
not_nan = np.logical_not(np.isnan(x))
indices = np.arange(len(x))
interp = interp1d(indices[not_nan], x[not_nan], kind = 'nearest')
p = interp(indices)

N = len(p)
dt = 900.0 #Time step (seconds)
fs = 1./dt #Sampling frequency
KA,PSD = oned_Fourierspectrum(p,dt) # Call Song's 1D FS function
time_axis = np.linspace(0.0,N,num = N,endpoint = False)*15/(60*24)
plot_freq = 24*3600.*KA #Convert to cycles per day
plot_period = 1.0/plot_freq # convert to days/cycle
fpsd = plot_freq*PSD
d = -1
while d <335:
d = d + 1
y = fpsd[d]
y1 = y1 + [y]
m = np.mean(y1)
m1 = m1 + [m]
print m1
--------------------------------------------------------------------------------

My purpose is make a list of [mean(fpsd[0]), mean(fpsd[1]), mean(fpsd[2]).. mean(fpsd[335])]. Each y1 would be the list of fpsd[d].

I check it is working pretty well before second while loop and I can get individual mean of fpsd[d]. However, with second whole loop, it produces definitely wrong numbers. Would you help me this problem?
```
 0
winefrog (28)
3/1/2013 8:59:59 AM
comp.lang.python 77058 articles. 3 followers.

9 Replies
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```Am 01.03.2013 09:59, schrieb Isaac Won:
> try to make my triple nested loop working. My code would be:
> c = 4
[...]
> while c <24:
>          c = c + 1

This is bad style and you shouldn't do that in python. The question that
comes up for me is whether something else is modifying "c" in that loop,
but I think the answer is "no". For that reason, use Python's way:

for c in range(5, 25):
...

That way it is also clear that the first value in the loop is 5, while
the initial "c = 4" seems to suggest something different. Also, the last
value is 24, not 23.

>          while d <335:
>                  d = d + 1
>                  y = fpsd[d]
>                  y1 = y1 + [y]
>                 m = np.mean(y1)
>          m1 = m1 + [m]

Apart from the wrong indention (don't mix tabs and spaces, see PEP 8!)
and the that "d in range(336)" is better style, you don't start with an
empty "y1", except on the first iteration of the outer loop.

I'm not really sure if that answers your problem. In any case, please
drop everything not necessary to demostrate the problem before posting.
This makes it easier to see what is going wrong both for you and others.
Also make sure that others can actually run the code.

Greetings from Hamburg!

Uli

```
 0
3/1/2013 12:00:42 PM
```--bcaec54d4cfcd4687c04d6dc95c2
Content-Type: text/plain; charset=UTF-8

On Fri, Mar 1, 2013 at 7:00 AM, Ulrich Eckhardt <
ulrich.eckhardt@dominolaser.com> wrote:

> Am 01.03.2013 09:59, schrieb Isaac Won:
>
>  try to make my triple nested loop working. My code would be:
>> c = 4
>>
> [...]
>
>  while c <24:
>>          c = c + 1
>>
>
> This is bad style and you shouldn't do that in python. The question that
> comes up for me is whether something else is modifying "c" in that loop,
> but I think the answer is "no". For that reason, use Python's way:
>
>   for c in range(5, 25):
>       ...
>
> That way it is also clear that the first value in the loop is 5, while the
> initial "c = 4" seems to suggest something different. Also, the last value
> is 24, not 23.
>
>
>
> I concur with Uli, and add the following thoughts:  What is going on with
[y]?  Is this really a list?  So what is y1 + y1 + [y] doing?

>
>           while d <335:
>>                  d = d + 1
>>                  y = fpsd[d]
>>                  y1 = y1 + [y]
>>                 m = np.mean(y1)
>>          m1 = m1 + [m]
>>
>
> In your outer loop you initialize these values each pass:

dt = 900.0 #Time step (seconds)
fs = 1./dt #Sampling frequency

This should me moved out of the loop since nothing changes with dt or fs

> Apart from the wrong indention (don't mix tabs and spaces, see PEP 8!) and
> the that "d in range(336)" is better style, you don't start with an empty
> "y1", except on the first iteration of the outer loop.
>
> I'm not really sure if that answers your problem. In any case, please drop
> everything not necessary to demostrate the problem before posting. This
> makes it easier to see what is going wrong both for you and others. Also
> make sure that others can actually run the code.
>
>
> Greetings from Hamburg!
>
> Uli
>
>
>
> --
> http://mail.python.org/**mailman/listinfo/python-list<http://mail.python.org/mailman/listinfo/python-list>
>

--
Joel Goldstick
http://joelgoldstick.com

--bcaec54d4cfcd4687c04d6dc95c2
Content-Type: text/html; charset=UTF-8
Content-Transfer-Encoding: quoted-printable

<div dir=3D"ltr"><br><div class=3D"gmail_extra"><br><br><div class=3D"gmail=
_quote">On Fri, Mar 1, 2013 at 7:00 AM, Ulrich Eckhardt <span dir=3D"ltr">&=
lt;<a href=3D"mailto:ulrich.eckhardt@dominolaser.com" target=3D"_blank">ulr=
ich.eckhardt@dominolaser.com</a>&gt;</span> wrote:<br>
<blockquote class=3D"gmail_quote" style=3D"margin:0px 0px 0px 0.8ex;border-=
left:1px solid rgb(204,204,204);padding-left:1ex">Am 01.03.2013 09:59, schr=
ieb Isaac Won:<div class=3D"im"><br>
<blockquote class=3D"gmail_quote" style=3D"margin:0px 0px 0px 0.8ex;border-=
left:1px solid rgb(204,204,204);padding-left:1ex">
try to make my triple nested loop working. My code would be:<br>
c =3D 4<br>
</blockquote></div>
[...]<div class=3D"im"><br>
<blockquote class=3D"gmail_quote" style=3D"margin:0px 0px 0px 0.8ex;border-=
left:1px solid rgb(204,204,204);padding-left:1ex">
while c &lt;24:<br>
=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0c =3D c + 1<br>
</blockquote>
<br></div>
This is bad style and you shouldn&#39;t do that in python. The question tha=
t comes up for me is whether something else is modifying &quot;c&quot; in t=
hat loop, but I think the answer is &quot;no&quot;. For that reason, use Py=
thon&#39;s way:<br>

<br>
=C2=A0 for c in range(5, 25):<br>
=C2=A0 =C2=A0 =C2=A0 ...<br>
<br>
That way it is also clear that the first value in the loop is 5, while the =
initial &quot;c =3D 4&quot; seems to suggest something different. Also, the=
last value is 24, not 23.<div class=3D"im"><br>
<br>
<br></div></blockquote><div>I concur with Uli, and add the following though=
ts:=C2=A0 What is going on with [y]?=C2=A0 Is this really a list?=C2=A0 So =
what is y1 + y1 + [y] doing? <br></div><blockquote class=3D"gmail_quote" st=
yle=3D"margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padd=
ing-left:1ex">
<div class=3D"im">
<br>
<blockquote class=3D"gmail_quote" style=3D"margin:0px 0px 0px 0.8ex;border-=
left:1px solid rgb(204,204,204);padding-left:1ex">
=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0while d &lt;335:<br>
=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0d =3D d + 1<b=
r>
=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0y =3D fpsd[d]=
<br>
=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0y1 =3D y1 + [=
y]<br>
=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 m =3D np.mean(y1)<b=
r>
=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0m1 =3D m1 + [m]<br>
</blockquote>
<br></div></blockquote><div>In your outer loop you initialize these values =
each pass:<br><br>=C2=A0 =C2=A0 =C2=A0 =C2=A0 dt =3D 900.0 #Time step (seco=
nds)<br>
=C2=A0 =C2=A0 =C2=A0 =C2=A0 fs =3D 1./dt #Sampling frequency<br>
<br></div><div>This should me moved out of the loop since nothing changes w=
ith dt or fs<br></div><div><br>=C2=A0</div><blockquote class=3D"gmail_quote=
" style=3D"margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);=
padding-left:1ex">
<div class=3D"im"></div>
Apart from the wrong indention (don&#39;t mix tabs and spaces, see PEP 8!) =
and the that &quot;d in range(336)&quot; is better style, you don&#39;t sta=
rt with an empty &quot;y1&quot;, except on the first iteration of the outer=
loop.<br>

<br>
I&#39;m not really sure if that answers your problem. In any case, please d=
rop everything not necessary to demostrate the problem before posting. This=
makes it easier to see what is going wrong both for you and others. Also m=
ake sure that others can actually run the code.<br>

<br>
<br>
Greetings from Hamburg!<br>
<br>
Uli<span class=3D""><font color=3D"#888888"><br>
<br>
<br>
<br>
-- <br>
<a href=3D"http://mail.python.org/mailman/listinfo/python-list" target=3D"_=
blank">http://mail.python.org/<u></u>mailman/listinfo/python-list</a><br>
</font></span></blockquote></div><br><br clear=3D"all"><br>-- <br><div dir=
=3D"ltr"><div>Joel Goldstick<br></div><a href=3D"http://joelgoldstick.com" =
target=3D"_blank">http://joelgoldstick.com</a><br></div>
</div></div>

--bcaec54d4cfcd4687c04d6dc95c2--
```
 0
3/1/2013 1:00:01 PM
```On Fri, Mar 1, 2013 at 7:59 PM, Isaac Won <winefrog@gmail.com> wrote:
> while c <24:
>         for columns in ( raw.strip().split() for raw in f ):
>         while d <335:

Note your indentation levels: the code does not agree with your
subject line. The third loop is not actually inside your second.
Should it be?

ChrisA
```
 0
rosuav (4324)
3/1/2013 1:41:05 PM
```Thank you, Chris.
I just want to acculate value from y repeatedly.
If y = 1,2,3...10, just have a [1,2,3...10] at onece.
On Friday, March 1, 2013 7:41:05 AM UTC-6, Chris Angelico wrote:
> On Fri, Mar 1, 2013 at 7:59 PM, Isaac Won <winefrog@gmail.com> wrote:
>
> > while c <24:
>
> >         for columns in ( raw.strip().split() for raw in f ):
>
> >         while d <335:
>
>
>
> Note your indentation levels: the code does not agree with your
>
> subject line. The third loop is not actually inside your second.
>
> Should it be?
>
>
>
> ChrisA

```
 0
winefrog (28)
3/1/2013 4:14:03 PM
```Thank you, Chris.
I just want to acculate value from y repeatedly.
If y = 1,2,3...10, just have a [1,2,3...10] at onece.
On Friday, March 1, 2013 7:41:05 AM UTC-6, Chris Angelico wrote:
> On Fri, Mar 1, 2013 at 7:59 PM, Isaac Won <winefrog@gmail.com> wrote:
>
> > while c <24:
>
> >         for columns in ( raw.strip().split() for raw in f ):
>
> >         while d <335:
>
>
>
> Note your indentation levels: the code does not agree with your
>
> subject line. The third loop is not actually inside your second.
>
> Should it be?
>
>
>
> ChrisA

```
 0
winefrog (28)
3/1/2013 4:14:03 PM
```On Friday, March 1, 2013 7:41:05 AM UTC-6, Chris Angelico wrote:
> On Fri, Mar 1, 2013 at 7:59 PM, Isaac Won <winefrog@gmail.com> wrote:
>
> > while c <24:
>
> >         for columns in ( raw.strip().split() for raw in f ):
>
> >         while d <335:
>
>
>
> Note your indentation levels: the code does not agree with your
>
> subject line. The third loop is not actually inside your second.
>
> Should it be?
>
>
>
> ChrisA

Yes, the thiird lood should be inside of my whole loop.
Thank you,
Isaac
```
 0
winefrog (28)
3/1/2013 4:18:54 PM
```On Friday, March 1, 2013 7:41:05 AM UTC-6, Chris Angelico wrote:
> On Fri, Mar 1, 2013 at 7:59 PM, Isaac Won <winefrog@gmail.com> wrote:
>
> > while c <24:
>
> >         for columns in ( raw.strip().split() for raw in f ):
>
> >         while d <335:
>
>
>
> Note your indentation levels: the code does not agree with your
>
> subject line. The third loop is not actually inside your second.
>
> Should it be?
>
>
>
> ChrisA

Yes, the thiird lood should be inside of my whole loop.
Thank you,
Isaac
```
 0
winefrog (28)
3/1/2013 4:18:54 PM
```Thank you Ulich for reply,
What I really want to get from this code is m1 as I told. For this purpose, for instance, values of fpsd upto second loop and that from third loop should be same, but they are not. Actually it is my main question.
Thank you,
Isaac
On Friday, March 1, 2013 6:00:42 AM UTC-6, Ulrich Eckhardt wrote:
> Am 01.03.2013 09:59, schrieb Isaac Won:
>
> > try to make my triple nested loop working. My code would be:
>
> > c = 4
>
> [...]
>
> > while c <24:
>
> >          c = c + 1
>
>
>
> This is bad style and you shouldn't do that in python. The question that
>
> comes up for me is whether something else is modifying "c" in that loop,
>
> but I think the answer is "no". For that reason, use Python's way:
>
>
>
>    for c in range(5, 25):
>
>        ...
>
>
>
> That way it is also clear that the first value in the loop is 5, while
>
> the initial "c = 4" seems to suggest something different. Also, the last
>
> value is 24, not 23.
>
>
>
>
>
>
>
> >          while d <335:
>
> >                  d = d + 1
>
> >                  y = fpsd[d]
>
> >                  y1 = y1 + [y]
>
> >                 m = np.mean(y1)
>
> >          m1 = m1 + [m]
>
>
>
> Apart from the wrong indention (don't mix tabs and spaces, see PEP 8!)
>
> and the that "d in range(336)" is better style, you don't start with an
>
> empty "y1", except on the first iteration of the outer loop.
>
>
>
> I'm not really sure if that answers your problem. In any case, please
>
> drop everything not necessary to demostrate the problem before posting.
>
> This makes it easier to see what is going wrong both for you and others.
>
> Also make sure that others can actually run the code.
>
>
>
>
>
> Greetings from Hamburg!
>
>
>
> Uli

```
 0
winefrog (28)
3/1/2013 4:28:21 PM
```Am 01.03.2013 17:28, schrieb Isaac Won:
> What I really want to get from this code is m1 as I told. For this
> purpose, for instance, values of fpsd upto second loop and that from
> third loop should be same, but they are not. Actually it is my main
> question.

You are not helping yourself...

>> In any case, please drop everything not necessary to demostrate the
>> problem before posting. This makes it easier to see what is going
>> wrong both for you and others. Also make sure that others can
>> actually run the code.

Read this carefully, I didn't write that to fill up empty space. Also,
read Eric S. Raymond's essay on asking smart questions (you can easily
locate it online), which the problems with your question in a much more
general way.

Uli

```
 0
3/4/2013 10:08:47 AM
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Hi! I'm new to labview and I've got some problems. I want to program a control for a testing facility. therefore I want to program several while-loops&nbsp; nested in each other, according to a designed Nassi-Shneiderman-diagram. So if the stop condition for an inner while loop is true (e.g. measure device mistake), the program should jump out of that while loop in the next outer while-loop. is that possible? Thank you right now! Yes it is possible When you stop the inner loop, from inside the inner loop, just&nbsp;wire/pass an appropriate&nbsp;stop condition ( stop if tr...

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Hi again everyone, Here is my rather clunky code (and I know it is rather inefficient): ------------------------------------------------------------------------------------------------------------------------------ while e_t lt 2 do begin for x=4e003, 20e003, 4e003 do begin for c=0.006, 0.01, 0.004 do begin for o=(50*!pi/180), (70*!pi/180), (10*!pi/180) do begin v= (a*x) ind_small = where(file[1,*] lt 2*x,count) if count eq 0 then te_small=0 if count gt 0 then begin ext_small = file[*,ind_small] le_small= ext_small[1,*] te_small = total(le_small^3) endif ind_large = where(file[1,*] ge...

what diference between timed loop and while loop and for loop
If I want to count 2 second working in the loop and next then going out of the loop I don't know&nbsp;which the loop &nbsp;I can use Message Edited by Jairak on 07-26-2008 03:14 PM Why do you need a loop to count for 2 seconds? To learn more about LabVIEW it is recommended that you go through the tutorial(s) and look over the material in the NI Developer Zone's <a href="http://zone.ni.com/devzone/cda/tut/p/id/5054" target="_blank">Learning Center</a> which provides links to other materials and other tutorials. You can also take the <a href=...

Nested loops, does it run the inner loop first then the outer loop?
I wrote this simple code for i=1:6 for c=1:6 fprintf('%i\n c:',c); fprintf('%i\n i:',i); end end and got the following output c:1 i:2 c:1 i:3 c:1 i:4 c:1 i:5 c:1 i:6 c:1 i:1 c:2 i:2 c:2 i:3 c:2 i:4 c:2 i:5 c:2 i:6 c:2 i:1 c:3 i:2 c:3 i:3 c:3 i:4 c:3 i:5 c:3 i:6 c:3 i:1 c:4 i:2 c:4 i:3 c:4 i:4 c:4 i:5 c:4 i:6 c:4 i:1 c:5 i:2 c:5 i:3 c:5 i:4 c:5 i:5 c:5 i:6 c:5 i:1 c:6 i:2 c:6 i:3 c:6 i:4 c:6 i:5 c:6 ...

nest an each loop within an each loop??
I have this each function: jQuery(function(\$){ \$('#myCarousel img').each(function(index) { var imgWidth=\$('#myCarousel img').width(); alert(imgWidth); \$this = \$(this).wrap('<div class="img-caption" style="width:' + imgWidth + 'px; float:left;" />'); \$('<p>' + \$this.attr("title") + '</p>').insertAfter(\$this); }); }); How and where do I nest this 2nd each loop inside the first one?? Both must run and they are looking for different image IDs. It does not work to try having them run ...

Ending a while loop inside a while loop
How do I make a while loop run as long as the while loop that contains it is running? I tried wiring both conditional terminals to a stop button in the outer loop, but that doesnt seem to work? Is there another way? &nbsp; Thanks. It doesn't work because of data dependency. Once you are inside the inner loop the outer loop will not go to the next iteration until the inner loop is done. It sounds to me like you want parallel loops running, rather than one inside the other. If you open the Example Finder (Help -&gt; Find Examples), and search for "loops", open the examples...

Converting a nested for loop to a while loop.
I am working on a problem where I need to convert a nested for loop to a while loop. I've got the problem partially solved but I was only able to get the code to initialize the first row of the Array. Where am I going wrong? Here is the initial code that I made for the for loop: A = [3 5 4;-8 -1 33;-17 6 -9]; B = zeros(size(A)) for i = 1:1:size(A,1) for j = 1:1:size(A,2) if(A(i,j) >= 1) B(i,j)=A(i,j)+20 else B(i,j)=log(A(i,j)) end end end Here is what I came up for the while loop: B = zeros(size(A)); i = 0; j = 0; while i < size(A,1) ...

parfor loop with nested for loop
Hi all, I'm new to this group, but googling my problem always points here so I thought I'd sign up. I'm running multiple iterations of a time-evolving Monte Carlo simulation in Matlab. Since each iteration is initialized randomly at the first time point, the iterations can safely be run in parallel on a quad core PC. I've previously been doing this by simply running 4 simultaneous Matlab sessions on one machine, but I thought I would save my institution some licenses and automate the process at the same time. The problem is that my code essentially has multiple nested for ...

nesting for loops in a parfor loop
Hi, I am trying to nest several for loops in a parfor loop. I have even read the documentation and several other queries/replies before posting here. I have a large dataset that I need to iterate over, calculating a property which would result in a prohibitively large array if I sent each answer to a separate element, and doing this on one cpu will take a prohibitively long time. Instead, what I am doing is reducing the array by another property, and then combining the calculated results in bins of this second property (essentially making a histogram). The parfor section of my cod...

Web resources about - Triple nested loop python (While loop insde of for loop inside of while loop) - comp.lang.python

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