error using ode45 in gui
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while debugging code for flat-fire using ode45 it gives error
err0r:-
??? Error while evaluating uicontrol Callback
??? Error using ==> feval
Undefined function or method 'fnflatfiredragwind' for input
arguments of type 'double'.
Error in ==> guitry>togglebutton1_Callback at 187
[t,c,te,ze,ie] =
ode45('fnflatfiredragwind',tspan,c0,options,w1,w2,w3,k);
??? Error while evaluating uicontrol Callback
*
here is the function defined in toggle button
function togglebutton1_Callback(hObject, eventdata, handles)
v0 = str2num(get(handles.edit1,'string'));
theta = str2num(get(handles.edit2,'string'));
theta = theta*pi/180;
w1 = str2num(get(handles.edit3,'string'));
w2 = str2num(get(handles.edit4,'string'));
w3 = str2num(get(handles.edit5,'string'));
k = str2num(get(handles.edit6,'string'));
set(handles.text1,'string',result);
c0 = [0;v0*cos(theta);0;v0*sin(theta);0;0];
options = odeset('events','on');
tspan = [0 10];
[t,c,te,ze,ie] = ode45('fnflatfiredragwind',tspan,c0,options,w1,w2,w3,k);
what is this error ????????????????
please help me for this
thanks
pawan kumar
1 Kommentar
Jan
am 28 Sep. 2011
Please use proper code formatting to improve the readability. Follow the "Markup help" link to learn the details.
Antworten (4)
Grzegorz Knor
am 28 Sep. 2011
Replace line:
[t,c,te,ze,ie] = ode45('fnflatfiredragwind',tspan,c0,options,w1,w2,w3,k);
with:
[t,c,te,ze,ie] = ode45(@fnflatfiredragwind,tspan,c0,options,w1,w2,w3,k);
5 Kommentare
Grzegorz Knor
am 29 Sep. 2011
You don't pass the k argument to the function. Please correct this line:
function [value,isterminal,dircn] = fnflatfiredragwind(t,c,flag,w1,w2,w3,k)
Jan
am 28 Sep. 2011
The error means, that the file "fnflatfiredragwind.m" cannot be found in the Matlab path and the current directory (see cd). Where is it? Is it a local subfunction? Then Grzegorz's idea of using a function handle might help.
0 Kommentare
Walter Roberson
am 29 Sep. 2011
Convert
[t,c,te,ze,ie] =
ode45(@fnflatfiredragwind,tspan,c0,options,w1,w2,w3,k);
to
[t,c,te,ze,ie] =
ode45(@(t) fnflatfiredragwind(t,w1,w2,w3,k),tspan,c0,options);
convert
function [value,isterminal,dircn] = fnflatfiredragwind(t,c,flag,w1,w2,w3)
to
function [value,isterminal,dircn] = fnflatfiredragwind(t,c,flag,w1,w2,w3,k)
2 Kommentare
Walter Roberson
am 4 Okt. 2011
Correction:
[t,c,te,ze,ie] =
ode45(@(t) fnflatfiredragwind(t,w1,w2,w3,k),tspan,c0,options);
should be
[t,c,te,ze,ie] =
ode45(@(t,c) fnflatfiredragwind(t,c,[],w1,w2,w3,k),tspan,c0,options);
pawan kumar
am 10 Okt. 2011
2 Kommentare
Walter Roberson
am 10 Okt. 2011
Please point me to a reference page or user guide page that shows passing additional variables by placing them after the "options" structure in an ode*() call. I have been unable to find such a page myself; all I have been able to find so far is pages that say specifically that YOU CANNOT DO THAT.
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