diag(.) does not work

diag function works in a wrong way as shown in the figure. How can i fix it?

[Matt J]

What happens when you do,

 >> whos diag

[Stephen23]

whos diag -all

Answer 1

[Walter Roberson]

I suspect you accidentally assigned zeros to a variable named diag, so your call is indexing rather than invoking the function.

Answer 2

[madhan ravi]

Try

clear all
 x=[8 1 6;3 5 7;4 9 2]
diag(x)