rearranging matrices horizontally rather than vertically

Question

AA 2015-5-2

回答： pfb 2015-5-2

I want to reshape this matrix but the following command does the rearrangement not properly.

b=(rand(30,1)).'
c = reshape(b,[3,10])

i want to rearrange in the following manner

b= 4 1 3 5 7 1 2 3 5 6 ...... 2 3 4

c= 4 1 3 5 7 1 2 3 5 6 (10 columns)

My command rearranges c as 4 5 2 ....

how can i change this?

Answer 1

pfb 2015-5-2

This is because the index order in a matrix is along columns. I'm not sure your command does what you say. Anyway

 b= [4 1 3 5 7 1 2 3 5 6 1 2 ];
 c = reshape(b,[3,4]);

gives

 c =
   5     2     6
   7     3     1
   1     5     2

while

c = reshape(b,[4,3])'

gives

 c =
   1     3     5
   1     2     3
   6     1     2

Probably the random numbers are only for the sake of example. If this is not the case, why don't you simply write

b = rand(3,10);

?