matplotlib-users

[Matplotlib-users] Plot a matrix in one command?

[Piter_ <x....@gm...>]

Hi all.
I have a matrix M:
First column is X ans the rest are Ys. Lets say  100 of them (1000
sometimes).
So far I can plot it like
plot(M(:,1), M(:,2),M(:,1),M(:,3)... and so on and so on)
Is there any possibility to do it in matlab way? Like:

plot(M(:,1),M(:,2:end))

This is main thing stopping me from migration from matlab to Python now :(

Thanks.
Petro.

Re: [Matplotlib-users] Plot a matrix in one command?

[Scott S. <sco...@gm...>]

>2009/10/27 Piter_ <x....@gm...>:
> I have a matrix M:
> First column is X ans the rest are Ys. Lets say  100 of them (1000
> sometimes).
> So far I can plot it like
> plot(M(:,1), M(:,2),M(:,1),M(:,3)... and so on and so on)
> Is there any possibility to do it in matlab way? Like:
>
> plot(M(:,1),M(:,2:end))

Hi Piter,

Does the following do what you want?

>>> import numpy as np
>>> import matplotlib.pyplot as plt
>>> x = np.arange(10)
>>> y = np.random.random((10, 5))
>>> M = np.column_stack((x, y))
>>> plt.plot(M[:, 0], M[:, 1:])
>>> plt.show()

Python indices start from zero, Matlab indices start from 1.

Cheers,
Scott

Re: [Matplotlib-users] Plot a matrix in one command?

[Gökhan S. <gok...@gm...>]

2009/10/27 Piter_ <x....@gm...>

> Hi all.
> I have a matrix M:
> First column is X ans the rest are Ys. Lets say  100 of them (1000
> sometimes).
> So far I can plot it like
> plot(M(:,1), M(:,2),M(:,1),M(:,3)... and so on and so on)
> Is there any possibility to do it in matlab way? Like:
>

You can't index arrays with regular parentheses in Python. How do you
distinguish function calls from array-matrix indexing in Matlab?


>
> plot(M(:,1),M(:,2:end))
>
> This is main thing stopping me from migration from matlab to Python now :(
>

> Thanks.
> Petro.
>
>
>
>
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-- 
Gökhan