Calling m files from a central m file - ODE routine
in [Matlab]
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From: Paulo on 11 Jan 2010 05:12 Hello all, I am trying to make a central .m file where I can choose between some equation (that should be each in a separated me file) and choose between some method to solve it (Euler, RKutta, etc). So I need one .m file that depending on some parameter value I will solve a choosed equation by the choosed algotihm (also the algotihm should be determined by a second parameter value). In a second moment I'll try to put this in a GUI interface. Well, I tried some commands and the matlab help , but after a couple of hours I figure out that I was looking at the wrong commands... Thank you all for the help. Paulo.
From: Prediger on 10 Jan 2010 20:30 The best way to explain how you can declare an m file is through an example: Declared m file: function [output1,output2…] = funname(input1) output1 = input1^2; output2 = input1^3+8; in the center m file you shall just simply copy the name of the function '[output1,output2…] = funname(input1)' into the body part hope helped
From: Steven Lord on 11 Jan 2010 10:16 "Paulo " <biomar1(a)yahoo.com.br> wrote in message news:hiethj$bda$1(a)fred.mathworks.com... > Hello all, > > I am trying to make a central .m file where I can choose between some > equation (that should be each in a separated me file) and choose between > some method to solve it (Euler, RKutta, etc). > > So I need one .m file that depending on some parameter value I will solve > a choosed equation by the choosed algotihm (also the algotihm should be > determined by a second parameter value). > > In a second moment I'll try to put this in a GUI interface. > > Well, I tried some commands and the matlab help , but after a couple of > hours I figure out that I was looking at the wrong commands... > > Thank you all for the help. > > Paulo. A hint: function y = selectAFunction(n, x) % Calling syntax: % % y = selectAFunction(2, 0:0.1:1) functionsToRun = {@sin, @cos, @tan, @exp}; % Add error checking for n here to make sure % it's an integer value between 1 and numel(functionToRun) y = functionsToRun{n}(x); -- Steve Lord slord(a)mathworks.com comp.soft-sys.matlab (CSSM) FAQ: http://matlabwiki.mathworks.com/MATLAB_FAQ
From: Paulo on 13 Jan 2010 16:13 Thank you guys. Worked very well. So I've gone to try with ode solving between diferent functions. But now I got stucked again: Iam still trying to solve diferent odes changing one parameter: Suppose I want to solve using ode23, one function, wich I need to choose, and let select.m be the calling sintax: y = selectAFunction(n); Iam trying to use [t,y] = ode23(@select, tspan, ci); to solve one of my differentials equations (each a diferent function) pointed at "selectAFunction" by a parameter at select.m Well, looks confuse, but I have now idea how to get better. Please help ! :-) THanks again! "Steven Lord" <slord(a)mathworks.com> wrote in message <hiffci$dmd$1(a)fred.mathworks.com>... > > "Paulo " <biomar1(a)yahoo.com.br> wrote in message > news:hiethj$bda$1(a)fred.mathworks.com... > > Hello all, > > > > I am trying to make a central .m file where I can choose between some > > equation (that should be each in a separated me file) and choose between > > some method to solve it (Euler, RKutta, etc). > > > > So I need one .m file that depending on some parameter value I will solve > > a choosed equation by the choosed algotihm (also the algotihm should be > > determined by a second parameter value). > > > > In a second moment I'll try to put this in a GUI interface. > > > > Well, I tried some commands and the matlab help , but after a couple of > > hours I figure out that I was looking at the wrong commands... > > > > Thank you all for the help. > > > > Paulo. > > A hint: > > function y = selectAFunction(n, x) > % Calling syntax: > % > % y = selectAFunction(2, 0:0.1:1) > > functionsToRun = {@sin, @cos, @tan, @exp}; > % Add error checking for n here to make sure > % it's an integer value between 1 and numel(functionToRun) > y = functionsToRun{n}(x); > > -- > Steve Lord > slord(a)mathworks.com > comp.soft-sys.matlab (CSSM) FAQ: http://matlabwiki.mathworks.com/MATLAB_FAQ >
From: Paulo on 14 Jan 2010 07:15 Help !!!! "Paulo " <biomar1(a)yahoo.com.br> wrote in message <hild11$t8a$1(a)fred.mathworks.com>... > Thank you guys. Worked very well. So I've gone to try with ode solving between diferent functions. But now I got stucked again: > > Iam still trying to solve diferent odes changing one parameter: > Suppose I want to solve using ode23, one function, wich I need to choose, and let select.m be the calling sintax: > > y = selectAFunction(n); > > Iam trying to use > > [t,y] = ode23(@select, tspan, ci); > > to solve one of my differentials equations (each a diferent function) pointed at "selectAFunction" by a parameter at select.m > > Well, looks confuse, but I have now idea how to get better. Please help ! :-) > > THanks again! > > > "Steven Lord" <slord(a)mathworks.com> wrote in message <hiffci$dmd$1(a)fred.mathworks.com>... > > > > "Paulo " <biomar1(a)yahoo.com.br> wrote in message > > news:hiethj$bda$1(a)fred.mathworks.com... > > > Hello all, > > > > > > I am trying to make a central .m file where I can choose between some > > > equation (that should be each in a separated me file) and choose between > > > some method to solve it (Euler, RKutta, etc). > > > > > > So I need one .m file that depending on some parameter value I will solve > > > a choosed equation by the choosed algotihm (also the algotihm should be > > > determined by a second parameter value). > > > > > > In a second moment I'll try to put this in a GUI interface. > > > > > > Well, I tried some commands and the matlab help , but after a couple of > > > hours I figure out that I was looking at the wrong commands... > > > > > > Thank you all for the help. > > > > > > Paulo. > > > > A hint: > > > > function y = selectAFunction(n, x) > > % Calling syntax: > > % > > % y = selectAFunction(2, 0:0.1:1) > > > > functionsToRun = {@sin, @cos, @tan, @exp}; > > % Add error checking for n here to make sure > > % it's an integer value between 1 and numel(functionToRun) > > y = functionsToRun{n}(x); > > > > -- > > Steve Lord > > slord(a)mathworks.com > > comp.soft-sys.matlab (CSSM) FAQ: http://matlabwiki.mathworks.com/MATLAB_FAQ > >
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