MATLAB Answers


Calling Function within a Function

Asked by Joe
on 19 Nov 2012

Calling a function inside of a another function.

what I would like to do is take

function x = fgIntersect(f, df, g, dg, x0, tol, maxIter)

and calculate the output x using another function,

function [r,rHist,N,fRoot] = newtonRaph(fHan,dfHan,x0,fTol,iterMax)

replacing fHan with h ( h = @ (x) f(x) - g(x)), and dfHan with dh ( dh = @ (x) df(x) - dg(x)).

so I would have:

function [r,rHist,N,fRoot] = newtonRaph(h,dfh,x0, tol,maxIter)

and the output of this function (newtonRaph), r is equal to the output of the previous function (fgIntersect), x.

  1 Comment

Matt J
on 19 Nov 2012

The GettingStarted section of the documentation should make it pretty clear how to make function calls inside other functions. It's no different than calling any old stock MATLAB command like SIN, COS, or SUM


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1 Answer

Answer by Image Analyst
on 19 Nov 2012

So just calculate fHan by calling h(), and calculate dfHan by calling dh(), in advance of you calling newtonRaph(), then pass them in to newtonRaph(). It's a simple process.


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