if else doesn't go through the loop

Hi,

I have a problem with if else and loop. Lets say I have an array zz double.The value of zz is 2,10,11,23,26,30,37,38,48,53,63,65,66,70,79 and 80. For each element will have its own calculation in the if else statement. I've tried to do if else like this

for Z = 1:numel(zz)

if zz==1;

      % if true,do calculation 1

elseif zz==2;

      % if true,do calculation 2

and so on.

When I run,it should output result for calculation 2 because the first element in the array is equal to 2. But the coding seems doesn't go through the if else coding. Any help is really appreciated. Thanks.

Answer 1

[Roger Stafford]

You have forgotten to index your zz entries in the for-loop. It should read:

 for Z = 1:numel(zz)
   if zz(Z)==1;
      % if true,do calculation 1
   elseif zz(Z)==2;
      % if true,do calculation 2

Otherwise you are placing an impossible condition on each 'if' or 'elseif'. None of them could ever be true.

[Nur]

Great! It works.Thanks a lot sir.

Answer 2

[Image Analyst]

How did you arrive at those numbers? Are you sure they're integers? Did you hard code them in, or are they supposed to be integers because of operations, like 2 = 1.3 + 0.7? If so, that 2 won't equal a int32(2). Read the FAQ: http://matlab.wikia.com/wiki/FAQ#Why_is_0.3_-_0.2_-_0.1_.28or_similar.29_not_equal_to_zero.3F

[Nur]

Thanks for your help.

Answer 3

[Nur]

The numbers are come from my previous coding, as shown below

ActualVelocity=[ActualVelocityP1,ActualVelocityP2..ActualVelocityP82]

zz = find(ActualVelocity>50.000);

Those zz numbers I got from above command.zz will have the ActualVelocity which are >50.00.So number 2,10,11,23,26,30,37,38,48,53,63,65,66,70,79 and 80 represent the location of the value(>50) in the zz array.