How to reshape different row of MNIST and display them

Hi,

Each row of MNIST dataset is an image of a number. so to display them I nead to reshape each row and plot. But since MNIST has 60000 row I can't use a for loop it takess a long time. Would you please tell me how can I reshape each row of MNIST matrix without using for loop in matlab and display each of them?

[Adam Danz]

What's a MNIST matrix?

Could you also clarify what you mean by reshape?

[Azar Alizadeh]

oh sure. sorry for unclear question. MNIST is a data set that of handwriiten numbers. so I have it as a 60000x784 matrix. that mean there are 60000 samples ( that are different number) so If I use "reshape" function of matlab like for example this {{{ I=imagesc(reshape((MNIST(1,:)),28,28)') }}} , I can reshape first row of my matrix and plot it with plots a number.

Since the dataset(matrix) is really big I don't want to use for loop to reshape each row. and plot them. would you please assist me how can I do that parrallel?

Answer 1

[Azar Alizadeh]

I got the answer :

matrixes=arrayfun(@(c)reshape(MNIST(c,:),28,28),1:size(MNIST,1),'uniformoutput',false);