Loading a file into a function error: "Unable to resolve the name __"
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I am trying to create a function that uses data from a file named Atmos.mat, however, no matter how I load the file, the function returns the error: "Unable to resolve the name Atmos.mat" Any help would be greatly appreciated :)
function x = rho(point)
load('Atmos.mat')
distance = zeros(1,229);
for k = 1:1:229
distance(k) = abs(point - Atmos.Hm(k));
end
for k = 1:1:229
if (distance(k) == min(distance))
break
end
end
x0 = Atmos.Hm(k);
p = @(x) (x - x0)/(Atmos.Hm(2) - Atmos.Hm(1));
f = @(x) p(x)*(p(x)-1)/2;
interpolation = @(x) Atmos.rhosi(k) + p(x)*(Atmos.rhosi(k + 1) - Atmos.rhosi(k))- f(x)*(Atmos.rhosi(k + 2) -2*Atmos.rhosi(k + 1)+ Atmos.rhosi(k));
x = interpolation(point)
end
2 个评论
Jonas
2021-7-2
does the error occur in the load() line or in the line you use the variable Atmos first? We don't know if your file Atmos.mat contains the variable Atmos
Michal Amar
2021-7-2
采纳的回答
Cris LaPierre
2021-7-2
1 个投票
You have given two different errors.
"Unable to resolve the name Atmos.mat"
Check that Atmos.mat is either in your current folder when you call your function, or in a folder that is on your MATLAB path.
"The error occurs in my first use of the variable Atmos.Hm"
Check that your mat file contains a table or structure Atmos with a variable or fieldname Hm.
9 个评论
Michal Amar
2021-7-2
Cris LaPierre
2021-7-2
For the 2nd error, in MATLAB, do the following
clear
load Atmos.mat
Check your workspace for a variable Atmos. Double click on it to open it in the Variable Editor to inspect its contents.
Michal Amar
2021-7-2
Cris LaPierre
2021-7-2
I'm afraid that is not enough context for me to interpret. When sharing an error message, share all the red text. Better still, attach your mat file to your post so we can run and test your code. You can use the paperclip icon to attach files.
Michal Amar
2021-7-2
Cris LaPierre
2021-7-2
And how do you call your function (what is your input point)?
Michal Amar
2021-7-2
Cris LaPierre
2021-7-2
Ok, thanks. Keep in mind that rho is a function that expects an input. You should always call it with an input.
In the function you have attached, you have added a clear to the top of your function. This is clearning your input variable. I see my early suggestion confused you. I wanted you to run that code in your Command Window, not add it to your function. Because you named your input variable points inside the function, and because you have a clear at the top of the function, you are getting this error.
>> rho(1000)
Reference to a cleared variable point.
Error in rho (line 7)
distance(k) = abs(point - Atmos.Hm(k));
Remove the clear from line 2.
When I inspect your mat file, I see it contains a table named Atmos1 instead of Atmos. Update your function to use the correct variable name, and as long as your function can access the mat file, your function should work.
Michal Amar
2021-7-2
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