Having problems with functions

2012 12 11
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I've built a function, which I'm giving three values x, y and a. however when I run it I get the following error:
??? Reference to a cleared variable a.
Error in ==> parallel_inverse at 68
a = a * pi/180;
This is my function start:
function parallel_inverse(x, y, a)
Does anyone know why I'm getting this error?

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Walter Roberson
Walter Roberson 2012-12-11
We need to see the code for your routine.
Ian Phillips
Ian Phillips 2012-12-11
As in where I call it? Or the code for the whole function? It's just:
>> parallel_inverse(0,0,10);
where I call it. I don't really want to display the whole function as it's coursework and I don't want it plagirised.
Matt J
Matt J 2012-12-11
编辑：Matt J 2012-12-11
Well, the error message is saying that you cleared the variable "a" somewhere prior to where you try to use it in the line
a = a* pi/180
If you don't want to show your code, then you'll have to go hunting for the clear statement yourself.
Ian Phillips
Ian Phillips 2012-12-11
Thanks. I found the problem. first two lines in the function are:
clear;
clc;

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