Unrecognized function or variable when recalling a function in another script

why I am getting Unrecognized function or variable when recalling a function in another script although when I ran the function by itself, it worked fine.

This is the function

function [Y]=Ya(D,w,Vs,option)
if D*w/Vs<1.1
    Hu=cos(D*w/Vs)
elseif D*w/Vs>1.1
    Hu=cos(1.1)
else  D*w/Vs==1.1
    Hu=cos(1.1);
end
if D*w/Vs<pi/2
    Hy=.26*(1-cos(D*w/Vs))
elseif D*w/Vs>pi/2
    Hy=.26
end
if option == 1
    Y = Hu
else option == 2
    Y = Hy
end
end

and that is the script in which I am using the function

D = [0,2,5,10,20]
Vs = 600
f = 0:50
w = f*2*pi
for j = 1:5
    wD=w.*D(j)/Vs
    for i = 1:length(w)
        [Y(i)] = Ya(D(j),w(i),Vs,2)
    end
    plot(f,Y)
end

when I ran the script that what is what it showed

Unrecognized function or variable 'Hy'.

Error in Ya (line 17)

Y = Hy

Error in Test2 (line 9)

[Y(i)] = Ya(D(j),w(i),Vs,2)

[Johan]

It looks like your fonction doesn't assign Hy in the case where D*w/Vs = pi/2. Either make one of the statement >= or <= or replace elsif by else.

[Dyuman Joshi]

- Hy is not assigned when D*w/Vs is equal to pi/2.

- Is there any use of wD defined in your script?

- You are running a double/nested for loop and only using a scalar array to store values.

[Walter Roberson]

else  D*w/Vs==1.1

that will calculate whether the condition holds and display the output. Notice that you did not use elseif there. You should probably have commented out the comparison.

[Rik]

Copy of the question in case this one gets edited away as well:

Unrecognized function or variable when recalling a function in another script

why I am getting Unrecognized function or variable when recalling a function in another script although when I ran the function by itself, it worked fine.

This is the function

function [Y]=Ya(D,w,Vs,option)
if D*w/Vs<1.1
    Hu=cos(D*w/Vs)
elseif D*w/Vs>1.1
    Hu=cos(1.1)
else  D*w/Vs==1.1
    Hu=cos(1.1);
end
if D*w/Vs<pi/2
    Hy=.26*(1-cos(D*w/Vs))
elseif D*w/Vs>pi/2
    Hy=.26
end
if option == 1
    Y = Hu
else option == 2
    Y = Hy
end
end

and that is the script in which I am using the function

D = [0,2,5,10,20]
Vs = 600
f = 0:50
w = f*2*pi
for j = 1:5
    wD=w.*D(j)/Vs
    for i = 1:length(w)
        [Y(i)] = Ya(D(j),w(i),Vs,2)
    end
    plot(f,Y)
end

when I ran the script that what is what it showed

Unrecognized function or variable 'Hy'.

Error in Ya (line 17)

Y = Hy

Error in Test2 (line 9)

[Y(i)] = Ya(D(j),w(i),Vs,2)

Answer 1

[Sai Teja G]

Hi Sam,

I understand that you are not able to run your defined function using another MATLAB script.

The error occurred because you have not assigned a default value to 'Hy' and are using 'if' and 'elseif' conditions to define it. To resolve this issue, you can refer to the code provided below:

if D*w/Vs<pi/2 
    Hy=.26*(1-cos(D*w/Vs)) 
elseif D*w/Vs>pi/2 % change this to else or either define default value to Hy 
    Hy=.26 
end 

Hope it helps!