MATLAB: How do i find the max value of xvec

max variable

x=vo*cosd(theta)*t;
x=x*1.0936;
 i=1:length(t)-1;
      xvec=[x(i) x(i+1)];

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The maximum value of a vector constructed with copies of all of x inside it cannot be any different than the maximum value of x, so just use max(x)

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MATLAB: Max value

Better to use the capabilities of MAX, than to use FIND and a comparison.

[mx,I] = max(x);  % mx is the maximum value, I is the location.

MATLAB: Max

No.

You can, however, use

[distmax, idx] = max([dist1 dist2 dist3])

and then idx will indicate which index in to the [dist1 dist2 dist3] matrix was the maximum. To figure out which of the variables that came from, you would need to know the size()'s of the variables.

It would be easier if you used

[distmax, idx] = max([max(dist1(:)), max(dist2(:)), max(dist3(:))])

and then idx would indicate which variable number the max was found in; relating the variable number to the variable name is a different matter.

Plain

[distmax, idx] = max([dist1 dist2 dist3])

is the abbreviation for the above for the special case where dist1, dist2, and dist3 are all guaranteed to be scalars (something your question does not allow us to assume).

Question: what do you want to happen if the identical maximum value exists in more than one of the variables?

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MATLAB: Max value

MATLAB: Max

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