To RESHAPE the number of elements must not change.

rows =     450; 
cols =      450; 
samples =   1024;
samples = size(data2d,2);
Data = reshape(data2d,cols,rows,samples);
Data = flip(Data,1);

I have the data2d of 168921*1024

It gives me reshape error ??

[Rik]

You are asking Matlab to put 172975104 elements in an array with 207360000 elements. What do you want to happen?

Answer 1

[Guillaume]

Well, yes as the error message says, the number of elements must no change. You tell us that currently data2 has 168921 (* 1024) elements and want to reshape to 450*450 (* 1024) = 202500 (* 1024) elements. 202500 is not equal to 168921, so indeed you can't reshape.

You need to choose a different shape or change your input so that it has the same numbers of element as your desired shape.

[Ramesh Bala]

Yes you are correct. I changed it to 411*411 and it works