i'm trying to input function of x,y
dy = input ('dy/dx = ','s');dy = @(x,y) dy;
and also try
dy = input ('dy/dx = ','s');dy = inline(dy);
then make a for loop to calculate y(2) based on the value of y(1) and dy(1) ===> which a function x,y
for o = 1 : 1 : n y(o+1) = y(o) + delx * dy(x(o),y(o)); dy(o+1) = feval(dy,x,y);end
here I want to use the just calculated y(2) to calculate the value of dy(2) and when run that code give me that error
In an assignment A(:) = B, the number of elements in A and B must be the same.Error in Final (line 500) y(o+1) = y(o) + delx * dy(x(o),y(o));
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update:
thank you (@Walter Roberson)
this help in convert the string to function
still there that error
Not enough input arguments.
when enter the for loop
for o = 1 : 1 : n y(o+1) = y(o) + delx * dy(x(o),y(o)); dy(x(o+1),y(o+1)) = feval(dy(o),x(o),y(o));end
and when made it
for o = 1 : 1 : n y(o+1) = y(o) + delx * dy(x(o),y(o)); dy(o+1) = feval(dy,x,y);end
the error is
Matrix dimensions must agree.Error in Final>@(x,y)x-yError in Final (line 500) dy(o+1) = feval(dy,x,y);
Best Answer