Unable to Print the Complete Confusion Matrix in Python

Question

I am building a image predicting model.

To get the better picture of the accuracy I am printing a confusion matrix using scikit learn.

When I was using 30 classes, the confusion matrix was completely displayed in the print screen, but as soon as I use my model on 50 classes, it starts to print truncated/shrinked versions of the confusion matrix.

I tried different ways to print it complete or write it into the file, but it did not work.

The output is something like this:

[[0 0 0 ... 0 0 0]
[0 0 0 ... 0 0 0]
[0 0 0 ... 0 0 0]
...
[0 0 0 ... 0 0 0]
[0 0 0 ... 0 0 0]
[0 0 0 ... 0 0 0]]

I also tried np.set_printoptions. but it does not work either.

With np.set_printoptions it is not even letting me print anything and I get errors like: typeError can not implement between int and str.

Look at a similar question https://stackoverflow.com/questions/1987694/how-to-print-the-full-numpy-array — Kamil Mahmood, Jul 30 '18 at 05:03

score 0 · Answer 1 · answered Jul 30 '18 at 05:02

0

You can print complete array without truncating by setting

np.set_printoptions(threshold=np.inf)

or

np.set_printoptions(threshold=np.nan)

By default arrays larger than 1000 elements will be truncated.

For full documentation, see http://docs.scipy.org/doc/numpy/reference/generated/numpy.set_printoptions.html.

answered Jul 30 '18 at 05:02

Kamil Mahmood

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Hi Kamil, As I mentioned in the question, its gives me an error or Typecast I guess : typeError can not implement between int and str. – Zaki Siddiqui Jul 30 '18 at 08:54
You cannot not pass str as threshold. It must be int e.g `np.set_printoptions(threshold=5000)` – Kamil Mahmood Jul 30 '18 at 08:58
Which numpy version are you using? – Kamil Mahmood Jul 30 '18 at 10:06

score 0 · Answer 2 · answered Jul 30 '18 at 05:05

0

You can convert you array to a list and then print it:

my_list = my_array.tolist()

answered Jul 30 '18 at 05:05

Martin Thoma

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Unable to Print the Complete Confusion Matrix in Python

2 Answers2