MATLAB Central Newsreader - ??? Error using ==> times Matrix dimensions must agree.

??? Error using ==> times Matrix dimensions must agree.

Dimitrios Zlitidis — Sun, 14 Dec 2008 20:02:01 -0500

I've made this function:

"function y = myfun3(I)

global R;
global Imed;
global si;
global hm;
global hp;

a = atan(R/(hm-hp));
rc = (0.67).*(I.^0.74).*(hp.^0.6);
rs = (0.67).*(I.^0.74).*(hm.^0.6);
c = sqrt( (hm - hp).^2 + R.^2);
d = (rc.^2 - rs.^2 + c.^2)./(2.*c);
b1 = acos(d./rc);

W = (a-b1+pi./2).*rc;
f= (1./(sqrt(2*pi)*si*I)).*exp(-(log(I)-log(Imed)).^2/(2*si^2));

y = W.*f;"

In my main function I use it like this:
"J = quad(@myfun3, Ic, Im)
        SFFR = 0.2*Ng*J"

The message I take is:
"??? Error using ==> times
Matrix dimensions must agree.

Error in ==> myfun3 at 11
rc = (0.67).*(I.^0.74).*(hp.^0.6);

Error in ==> quad at 77
y = f(x, varargin{:});

Error in ==> Eriksson_gui>pushbutton2_Callback at 411
        J = quad(@myfun3, Ic, Im)

Error in ==> gui_mainfcn at 96
        feval(varargin{:});

Error in ==> Eriksson_gui at 42
    gui_mainfcn(gui_State, varargin{:});

??? Error while evaluating uicontrol Callback"

What do I do wrong?!?!?!

Re: ??? Error using ==> times Matrix dimensions must agree.

Dave Brackett — Sun, 14 Dec 2008 21:00:04 -0500

"Dimitrios Zlitidis" <dimitriszli@gmail.com> wrote in message <gi3onp$8g9$1@fred.mathworks.com>...
> I've made this function:
>
> "function y = myfun3(I)
>
> global R;
> global Imed;
> global si;
> global hm;
> global hp;
>
>
> a = atan(R/(hm-hp));
> rc = (0.67).*(I.^0.74).*(hp.^0.6);
> rs = (0.67).*(I.^0.74).*(hm.^0.6);
> c = sqrt( (hm - hp).^2 + R.^2);
> d = (rc.^2 - rs.^2 + c.^2)./(2.*c);
> b1 = acos(d./rc);
>
> W = (a-b1+pi./2).*rc;
> f= (1./(sqrt(2*pi)*si*I)).*exp(-(log(I)-log(Imed)).^2/(2*si^2));
>
> y = W.*f;"
>
> In my main function I use it like this:
> "J = quad(@myfun3, Ic, Im)
> SFFR = 0.2*Ng*J"
>
> The message I take is:
> "??? Error using ==> times
> Matrix dimensions must agree.
>
> Error in ==> myfun3 at 11
> rc = (0.67).*(I.^0.74).*(hp.^0.6);
>
> Error in ==> quad at 77
> y = f(x, varargin{:});
>
> Error in ==> Eriksson_gui>pushbutton2_Callback at 411
> J = quad(@myfun3, Ic, Im)
>
> Error in ==> gui_mainfcn at 96
> feval(varargin{:});
>
> Error in ==> Eriksson_gui at 42
> gui_mainfcn(gui_State, varargin{:});
>
> ??? Error while evaluating uicontrol Callback"
>
> What do I do wrong?!?!?!

find the size of each variable in the offending line using 'size'. can you give an example of I and hp?

Re: ??? Error using ==> times Matrix dimensions must agree.

Dimitrios Zlitidis — Sun, 14 Dec 2008 22:42:02 -0500

"Dave Brackett" <davebrackett@hotmail.com> wrote in message <gi3s4k$2ms$1@fred.mathworks.com>...
> "Dimitrios Zlitidis" <dimitriszli@gmail.com> wrote in message <gi3onp$8g9$1@fred.mathworks.com>...
> > I've made this function:
> >
> > "function y = myfun3(I)
> >
> > global R;
> > global Imed;
> > global si;
> > global hm;
> > global hp;
> >
> >
> > a = atan(R/(hm-hp));
> > rc = (0.67).*(I.^0.74).*(hp.^0.6);
> > rs = (0.67).*(I.^0.74).*(hm.^0.6);
> > c = sqrt( (hm - hp).^2 + R.^2);
> > d = (rc.^2 - rs.^2 + c.^2)./(2.*c);
> > b1 = acos(d./rc);
> >
> > W = (a-b1+pi./2).*rc;
> > f= (1./(sqrt(2*pi)*si*I)).*exp(-(log(I)-log(Imed)).^2/(2*si^2));
> >
> > y = W.*f;"
> >
> > In my main function I use it like this:
> > "J = quad(@myfun3, Ic, Im)
> > SFFR = 0.2*Ng*J"
> >
> > The message I take is:
> > "??? Error using ==> times
> > Matrix dimensions must agree.
> >
> > Error in ==> myfun3 at 11
> > rc = (0.67).*(I.^0.74).*(hp.^0.6);
> >
> > Error in ==> quad at 77
> > y = f(x, varargin{:});
> >
> > Error in ==> Eriksson_gui>pushbutton2_Callback at 411
> > J = quad(@myfun3, Ic, Im)
> >
> > Error in ==> gui_mainfcn at 96
> > feval(varargin{:});
> >
> > Error in ==> Eriksson_gui at 42
> > gui_mainfcn(gui_State, varargin{:});
> >
> > ??? Error while evaluating uicontrol Callback"
> >
> > What do I do wrong?!?!?!
>
> find the size of each variable in the offending line using 'size'. can you give an example of I and hp?

hp is a variable I give, it's a number, for example 5.41. I is the variable I use to integrate with quad.

Re: ??? Error using ==> times Matrix dimensions must agree.

Dave Brackett — Mon, 15 Dec 2008 09:20:03 -0500

"Dimitrios Zlitidis" <dimitriszli@gmail.com> wrote in message <gi423q$eke$1@fred.mathworks.com>...
> "Dave Brackett" <davebrackett@hotmail.com> wrote in message <gi3s4k$2ms$1@fred.mathworks.com>...
> > "Dimitrios Zlitidis" <dimitriszli@gmail.com> wrote in message <gi3onp$8g9$1@fred.mathworks.com>...
> > > I've made this function:
> > >
> > > "function y = myfun3(I)
> > >
> > > global R;
> > > global Imed;
> > > global si;
> > > global hm;
> > > global hp;
> > >
> > >
> > > a = atan(R/(hm-hp));
> > > rc = (0.67).*(I.^0.74).*(hp.^0.6);
> > > rs = (0.67).*(I.^0.74).*(hm.^0.6);
> > > c = sqrt( (hm - hp).^2 + R.^2);
> > > d = (rc.^2 - rs.^2 + c.^2)./(2.*c);
> > > b1 = acos(d./rc);
> > >
> > > W = (a-b1+pi./2).*rc;
> > > f= (1./(sqrt(2*pi)*si*I)).*exp(-(log(I)-log(Imed)).^2/(2*si^2));
> > >
> > > y = W.*f;"
> > >
> > > In my main function I use it like this:
> > > "J = quad(@myfun3, Ic, Im)
> > > SFFR = 0.2*Ng*J"
> > >
> > > The message I take is:
> > > "??? Error using ==> times
> > > Matrix dimensions must agree.
> > >
> > > Error in ==> myfun3 at 11
> > > rc = (0.67).*(I.^0.74).*(hp.^0.6);
> > >
> > > Error in ==> quad at 77
> > > y = f(x, varargin{:});
> > >
> > > Error in ==> Eriksson_gui>pushbutton2_Callback at 411
> > > J = quad(@myfun3, Ic, Im)
> > >
> > > Error in ==> gui_mainfcn at 96
> > > feval(varargin{:});
> > >
> > > Error in ==> Eriksson_gui at 42
> > > gui_mainfcn(gui_State, varargin{:});
> > >
> > > ??? Error while evaluating uicontrol Callback"
> > >
> > > What do I do wrong?!?!?!
> >
> > find the size of each variable in the offending line using 'size'. can you give an example of I and hp?
>
>
> hp is a variable I give, it's a number, for example 5.41. I is the variable I use to integrate with quad.

So are none of the variables in the rc line matrices? Why do you have all of the element by element multiplication? Can you give an example of I?

Have you tried clearing your variables using 'clear' and trying again?