What is the problem in simple matrix operation.?

 clear all;clc
 names = {'A'; 'B'; 'C'; 'D'};
 marks = [27; 48; 84; 22];
 in_st = {names marks};
 in_st = [names num2cell(marks)];

 function [op_st1,op_st2] = print_Data(in_st)
 in_st = in_st;

 [~,idx] = sort(in_st(:,1));
 op_st1 = in_st(idx,:)

 [~,idx] = sort(in_st(:,2),'descend');
 op_st2 = in_st(idx,:)

I want op_st1 in ascending order, and op_st2 in descending order. It works well upto half program, what is the problem in remaining..?

[Azzi Abdelmalek]

What is the error message?

[Nimisha]

 Error using sort
 DIM and MODE arguments not supported for cell arrays.

 Error in print_Data (line 6)
 [~,idx] = sort(in_st(:,2),'descend');

The above error message i am getting

Answer 1

[Guillaume]

As the error message says and the documentation of sort states, you can't use the DIM and MODE arguments when sorting cell arrays.

However, since the descending order is just the reverse of the ascending order, why don't you just flip your first sort?

[~, idx] = sort(in_st(:, 1));
op_st1 = in_st(idx, :);
op_st2 = in_st(flipud(idx), :);

[Nimisha]

ITS true what you understand. In my program, i mean to say that, as a fisrt

 op_st1

i want to ascend names, that is true in program, BUT in

 op_st2

i want to descend marks, means second column..! Still not working.""

[Guillaume]

Oh, yes, sorry, I missed that. You can still reverse do what I said but on column 2:

[~, idx] = sort(in_st(:, 2));
op_st2 = in_st(flipud(indx), :);

Or you could convert column 2 to matrix:

[~, idx] = sort(cell2mat(in_st(:, 2)), 'descend');

Answer 2

[Azzi Abdelmalek]

Use curly brackets { }

[~,idx] = sort(in_st{:,2},'descend')

[Guillaume]

Huh? That's not going to work. It'll just convert the 2nd column of the cell array into a comma separated list that sort won't know what to do with.

[Nimisha]

 Error using sort
 Too many input arguments.

 Error in print_Data (line 6)
 [~,idx] = sort(in_st{:,2},'descend')

[Azzi Abdelmalek]

[~,idx] = sort([in_st{:,2}],'descend')