Function of an array

Question

I have an array defined in this way (extracting the third column of a dataset):

value=[]
value.append((p[3]))
x=np.array(value)

How can I do if I would like to obtain a new array containing the Log10 (o a different function) of the array x? I have tried with:

logx=np.array(log(x))

but it gives me the following error:

TypeError: 'numpy.ufunc' object is not subscriptable.

Where am I wrong?

What is p[3]? Could you please give a complete and working (but very short) example which displays this behavior. — tom10
– tom10, Commented Feb 18, 2013 at 20:23

Nikolay Polivanov · Accepted Answer · 2013-02-18 20:06:37Z

6

You can just use: logx = np.log(x)

answered Feb 18, 2013 at 20:06

Nikolay Polivanov

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3 Comments

I've trid but it gives me this error: NotImplementedError: Not implemented for this type what does it mean?

@user2044983: probably that your x isn't composed of numbers but of strings. What does print set(map(type, x)) return?

Please clarify what values has p.

Cameron Sparr · Accepted Answer · 2013-02-18 20:14:29Z

0

Not sure why Nikolay's answer isn't working for you, but you could also do:

logx = map(np.log, x)

answered Feb 18, 2013 at 20:14

Cameron Sparr

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