Produce a function to run each element of column vector through an equation to produce a column vector of outputs

Hello,

I have a set a data in a single column vector.

I would like to run each value through the equation that is attached as a screen shot.

In a function file I have created the following function:

function P = erf(A)
%Function to produce 'P' 
% 'P' is the error function of the rpec values (Input Array 'A')

%Define Mean of background
Ubg = 0.3991

%Define SD of rpec ratios
Orpec = 0.4580
 
%Define SD of background
Obg = 0.3751
 
%Define SD of specific 
Osp = 0.2963
 
%compute SD of rpec squared + SD of bg squared + SD of sp squared
inter1 = Orpec^2 + Obg^2 + Osp^2
 
%compute 2 times inter1
inter2 = 2*inter1
 
%compute square root of inter2 
SRI2 = sqrt(inter2)
 
%compute rpec - Ubg
inter3 = A-Ubg
 
%compute absolute values of inter3
ABI3 = abs(inter3)
 
%compute P
P = ABI3/SRI2
end

I then call the funciton in the command window and select my input array which is 'H' by:

erf(H)

The output array that is created does not have the values that I would expect.

Could anyone tell me where I am going wrong?

Sorry if this is a silly question im new to matlab and rusty on my maths!

Any help would be greatly appreciated!

Thanks x

[darova]

There is built-in function erf. Maybe it's because of it's overwiting. Try re-name your function

[darova]

Add here element-wise operator .^

[darova]

And here. Add here the dot ./

[Alice Gold]

Thank you so much darova!! This has fixed it completely!

[darova]

you are welcome!