Hello , i have the following code in matlab and trying to do it in matplotlib.

I have this code in matlab (in a function showGraphs):

...

m = size(myList, 3);

for k = 1:m

g = myList(:, :, k);

image(g + 1)

axis off

axis square

M(k) = getframe;

end;

and in another file (another function):

...

M = showGraphs(grids)

movie(M, 1)

I did so far:

def showGraphs(data):

data=sc.array([data])

n=sc.shape(data)[2]

for k in range(n):

mydata=data[:,:,k]

#plt.imshow(mydata+1) -->> this doesn't work

Also ,in order to do the animation :

grids=...(result from another function)

result=showGraph(grids)

fig=plt.figure()

ani=animation.FuncAnimation(fig,result,interval=30,blit=True)

plt.show()

Right now the program says "TypeError: 'NoneType' object is not callable" (it has errors in the animation call)

What should be my approach to this in order to have the animation?

Thank you!

You’re getting that error because the second argument to FuncAnimation (`result`

in your example) should be a function (not always; see example 2 linked below). Right now, if your `showGraphs`

function is defined in full, it returns a value of None, which gets saved to `result`

(hence the error).

You should take a look at some of the image animation examples (ex1, ex2).

-Tony

## ···

On Sat, Jan 21, 2012 at 9:07 AM, Gousios George <ggeo1@…83…3830…> wrote:

Hello , i have the following code in matlab and trying to do it in

matplotlib.

I have this code in matlab (in a function showGraphs):

…

m = size(myList, 3);

for k = 1:m

```
g = myList(:, :, k);
image(g + 1)
axis off
axis square
M(k) = getframe;
```

end;

and in another file (another function):

…

M = showGraphs(grids)

movie(M, 1)

I did so far:

def showGraphs(data):

```
data=sc.array([data])
n=sc.shape(data)[2]
for k in range(n):
mydata=data[:,:,k]
#plt.imshow(mydata+1) -->> this doesn't work
```

Also ,in order to do the animation :

grids=…(result from another function)

result=showGraph(grids)

fig=plt.figure()

ani=animation.FuncAnimation(fig,result,interval=30,blit=True)

plt.show()

Right now the program says "TypeError: ‘NoneType’ object is not

callable" (it has errors in the animation call)

What should be my approach to this in order to have the animation?

Thank you!

Στις 21/01/2012 04:54 μμ, ο/η Tony Yu έγραψε:

```
Hello , i have the following code in matlab and trying to do
```

it in

```
matplotlib.
I have this code in matlab (in a function showGraphs):
...
m = size(myList, 3);
for k = 1:m
g = myList(:, :, k);
image(g + 1)
axis off
axis square
M(k) = getframe;
end;
and in another file (another function):
...
M = showGraphs(grids)
movie(M, 1)
I did so far:
def showGraphs(data):
data=sc.array([data])
n=sc.shape(data)[2]
for k in range(n):
mydata=data[:,:,k]
#plt.imshow(mydata+1) -->> this doesn't work
Also ,in order to do the animation :
grids=...(result from another function)
result=showGraph(grids)
fig=plt.figure()
ani=animation.FuncAnimation(fig,result,interval=30,blit=True)
plt.show()
Right now the program says "TypeError: 'NoneType' object is
```

not

```
callable" (it has errors in the animation call)
What should be my approach to this in order to have the
```

animation?

```
Thank you!
```

```
You're getting that error because the second argument to
```

FuncAnimation (`result`

in your example) should be a function

(not always; see example 2 linked below). Right now, if your

`showGraphs`

function is defined in full, it returns a value

of None, which gets saved to `result`

(hence the error).

```
You should take a look at some of the image animation examples
```

(ex1 ,

ex2).

```
-Tony
```

```
I did now :
def showGraphs(data):
data=sc.array([data])
n=sc.shape(data)[2]
ims=[]
for k in range(n):
mydata=data[:,:,k]
im=plt.imshow(mydata+1)
ims.append([im])
return ims
and now it gives me "TypeError: Invalid dimensions for image data.
```

## ···

```
On Sat, Jan 21, 2012 at 9:07 AM, Gousios > George <ggeo1@...3830...> > wrote:
```

Please post short, but executable examples when possible. I’m not sure what your data looks like, but your call to `sc.array`

is strange (I’m not sure why you have square brackets, which effectively adds an unnecessary dimension to your data).

The code attached below should work.

Cheers,

-Tony

import numpy as np

import matplotlib.pyplot as plt

from matplotlib.animation import ArtistAnimation

fig = plt.figure()

def showGraphs(data):

```
data = np.asarray(data) # unnecessary in this example
n = np.shape(data)[2]
ims = []
#for mydata in np.rollaxis(data, -1):
for k in range(n):
mydata = data[:, :, k]
im = plt.imshow(mydata)
ims.append([im])
return ims
```

# 5 frames of a random 20 x 20 image

data = np.random.uniform(size=(20, 20, 5))

ims = showGraphs(data)

ani = ArtistAnimation(fig, ims)

plt.show()

## ···

On Sat, Jan 21, 2012 at 11:31 AM, Gousios George <ggeo1@…878…3830…> wrote:

Στις 21/01/2012 04:54 μμ, ο/η Tony Yu έγραψε:

```
On Sat, Jan 21, 2012 at 9:07 AM, Gousios > > George <ggeo1@...3830...> > > wrote:
```

```
Hello , i have the following code in matlab and trying to do
```

it in

```
matplotlib.
I have this code in matlab (in a function showGraphs):
...
m = size(myList, 3);
for k = 1:m
g = myList(:, :, k);
image(g + 1)
axis off
axis square
M(k) = getframe;
end;
and in another file (another function):
...
M = showGraphs(grids)
movie(M, 1)
I did so far:
def showGraphs(data):
data=sc.array([data])
n=sc.shape(data)[2]
for k in range(n):
mydata=data[:,:,k]
#plt.imshow(mydata+1) -->> this doesn't work
Also ,in order to do the animation :
grids=...(result from another function)
result=showGraph(grids)
fig=plt.figure()
ani=animation.FuncAnimation(fig,result,interval=30,blit=True)
plt.show()
Right now the program says "TypeError: 'NoneType' object is
```

not

```
callable" (it has errors in the animation call)
What should be my approach to this in order to have the
```

animation?

```
Thank you!
```

```
You're getting that error because the second argument to
```

FuncAnimation (`result`

in your example) should be a function

(not always; see example 2 linked below). Right now, if your

`showGraphs`

function is defined in full, it returns a value

of None, which gets saved to `result`

(hence the error).

```
You should take a look at some of the image animation examples
```

(ex1 ,

ex2).

```
-Tony
```

I did now :

```
def showGraphs(data):
data=sc.array([data])
n=sc.shape(data)[2]
```

ims=[]

```
for k in range(n):
mydata=data[:,:,k]
```

im=plt.imshow(mydata+1)

```
ims.append([im])
return ims
and now it gives me "TypeError: Invalid dimensions for image data.
```

���� 21/01/2012 07:05 ��, �/� Tony Yu ������:

```
���� 21/01/2012 04:54
```

��, �/� Tony Yu ������:

```
Hello , i have the
```

following code in matlab and trying to do it in

```
matplotlib.
I have this code in matlab (in a function
```

showGraphs):

```
...
m = size(myList, 3);
for k = 1:m
� � g = myList(:, :, k);
� � image(g + 1)
� � axis off
� � axis square
� � M(k) = getframe;
end;
and in another file (another function):
...
M = showGraphs(grids)
movie(M, 1)
I did so far:
def showGraphs(data):
� � data=sc.array([data])
� � n=sc.shape(data)[2]
� � for k in range(n):
� � � � mydata=data[:,:,k]
� � � � #plt.imshow(mydata+1) � �-->> this
```

doesn’t work

```
Also ,in order to do the animation :
grids=...(result from another function)
result=showGraph(grids)
fig=plt.figure()
```

ani=animation.FuncAnimation(fig,result,interval=30,blit=True)

```
plt.show()
Right now the program says "TypeError: 'NoneType'
```

object is not

```
callable" (it has errors in the animation call)
What should be my approach to this in order to
```

have the animation?

```
Thank you!
```

```
You're getting that error because the second
```

argument to FuncAnimation (`result`

in your

example) should be a function (not always; see

example 2 linked below). Right now, if your

`showGraphs`

function is defined in full, it

returns a value of None, which gets saved to

`result`

(hence the error).

```
You should take a look at some of the image
```

animation examples (ex1, ex2).

```
-Tony
```

I did now :

```
def showGraphs(data):
��� data=sc.array([data])
��� n=sc.shape(data)[2]
```

��� ims=[]

```
��� for k in range(n):
������� mydata=data[:,:,k]
```

������� im=plt.imshow(mydata+1)

```
������� ims.append([im])
��� return ims
and now it gives me "TypeError: Invalid dimensions for image
```

data.

```
Please post short, but executable examples when possible. I'm
```

not sure what your data looks like, but your call to

`sc.array`

is strange (I’m not sure why you have square

brackets, which effectively adds an unnecessary dimension to

your data).

```
The code attached below should work.
Cheers,
-Tony
import numpy as np
import matplotlib.pyplot as plt
from matplotlib.animation import ArtistAnimation
fig = plt.figure()
def showGraphs(data):
��� data = np.asarray(data) # unnecessary in this example
��� n = np.shape(data)[2]
��� ims = []
��� #for mydata in np.rollaxis(data, -1):
��� for k in range(n):
������� mydata = data[:, :, k]
������� im = plt.imshow(mydata)
������� ims.append([im])
��� return ims
# 5 frames of a random 20 x 20 image
data = np.random.uniform(size=(20, 20, 5))
ims = showGraphs(data)
ani = ArtistAnimation(fig, ims)
plt.show()
```

```
Now,it gives me 2 figures (why 2?) but empty.(maybe i didn't convert
```

right the matlab code below?)

```
The data in the showGraphs function is the result from this function
```

(in matlab):

```
.........
grids = zeros(n, n, t + 1);
grids(:, :, 1) = rest;
for i = 2:(t + 1)
��� Extended = extendLat1(rest);
��� rest = applyExtended(Extended);
��� grids(:, :, i) = rest;
end;
And i did this in python:
�� grids=sc.zeros((area,area,t+1))
��� rest=grids[:,:,0]
��� for i in range(1,t):
������� extended=extend(rest)
������� rest=apply_extend(extended)
������� grids[:,:,i]=rest
��� return grids
Thanks for helping!
```

## ···

```
On Sat, Jan 21, 2012 at 11:31 AM, Gousios > George <ggeo1@...3830...> > wrote:
```

```
On Sat, Jan 21, 2012 at 9:07 > > > AM, Gousios George <ggeo1@...3830...> > > > wrote:
```