Percentage Difference of Values stored in Two Matrices

I have two 40X1 matrices with values in for which I wish to calculate the percentage difference ie. the difference between the first two values, second two values in each etc.

temperature = matrix 1 analtemp = matrix 2

When trying to do a straight forward percentage difference calculation the variable is displayed as a 40X40 matrix with nothing in it:

PDif=100*((temperature-analtemp)/analtemp);

However, it will allow me to calculate the difference (not percentage) between the two as follows:

Dif=temperature-analtemp;

I cannot understand why this is occurring. Is anyone able to offer some assistance?

Thanks

Answer 1

[Azzi Abdelmalek]

PDif=100*(temperature-analtemp)./analtemp;

[Mike Scott]

Perfect thanks! Do you mind explaining what the . operator is doing in this case?

[Azzi Abdelmalek]

[10  20  30]./[2 5 3]

The result is

[10/2  20/5  30/3]

[Mike Scott]

I see. Thanks for your help!

[Ghazi Omairi]

thank you