If statement for a values in a string

Iam a Matlab newbi, so need some help. Working on a for-loop. In the for-loop my if statement doesn't work as i wish. I want it to work like this: When the value of i= one of the numbers in the string, h, make a plot of the function f(i). So the problem is the first line in the if-statement.

h=[8 17 25 30 36 41 49 58]

for i=1:65

F(i) 

if i= one of the values in the string defined above    

plot F(i)

end
end

Any suggestions to fix this if-statement?

Answer 1

[Jonathan Sullivan]

The variable h does appear to be a string, but rather a vector of doubles. What you want to use to determine if a scalar is equal to any element of a vector is the function ismember

Example

ismember(i,h)

Hope this helps.

[Andre]

Thanks for replying!

Doesn't the ismember function only tell if its true or false?

I want my function to be plotted if i=one of the values in h. I don't want to know if i=one of the values i h or not.

[Jan]

@Andre: I do not understand the last paragraph of your comment.

Answer 2

[Jan]

The most straight solution would be not to run the loop from 1 to 65, but:

h = [8 17 25 30 36 41 49 58]
for i = h
  ...

Now the loop runs through the elements of h only. If this does not matches your needs for any reasons, the suggested ismember is fine:

h = [8 17 25 30 36 41 49 58]
for i=1:65
  F(i) 
  if ismember(i, h)
    plot F(i)
  end
end

This is leaner and faster:

    if any(i == h)

[Andre]

I understand. Thanks to both of you for helping me out:)