My Selection Dialog Box Contains Two Options, but only Displays one Image

I attached an image of my code. For some reason when I choose either option(subtraction or division) in the dialog box the same image appears. I'm not sure what's wrong with my code.

Answer 1

[Walter Roberson]

Change

if 'Subtraction'

to

if length(indx) ~= 1
  uiwait(msgbox('Must select exactly one choice'));
elseif strcmp(list1{indx}, 'Subtraction')

[shiffraw dagnechaw]

Thank you so much sir, it worked. I'm still trying to figure out why my simple code didn't work

[Walter Roberson]

Your existing code

if 'Subtraction'

does not compare the user input to anything. Instead, it is an example of if being applied to a vector of values. When you apply if to a vector of values, the if is considered to succeed if all of the values in the vector are numerically non-zero. 'S' and 'u' and 'b' and so on are not char(0), so all of the entries in the vector are indeed numerically non-zero, so the test was considered to always succeed.

Note: the character '0' is char(48), numerically 48, and so is non-zero. Only char(0), known formally as NUL, is considered to be numerically zero.