Why this function is wrong written

My function is: funk1=3*((1-x).^2)*exp(-x.^2-(y+1).^2) and matlab send me and error but don't write where it is.

[KSSV]

Show the full code.....

[Dennis Semke]

x=linspace(-3,3,49); y=linspace(-3,3,49); funk1=3*((1-x).^2)*exp(-x.^2-(y+1).^2); mesh(funk1)

[Stephen23]

It works for me:

>> x = 2;
>> y = 3;
>> 3*((1-x).^2)*exp(-x.^2-(y+1).^2)
ans =   6.1835e-009

Whatever you are doing is causing an error.

[Dennis Semke]

hm i dont know why because matlab send me everytime the error 'Error in matlab_blatt6_1 (line 3) funk1=3*((1-x).^2)*exp(-x.^2-(y+1).^2)

so i cant meshplot it...

[KSSV]

YOu can mesh plot it..look at my answer....it is a mesh plot.

Answer 1

[Stephen23]

F = 3*((1-x).^2).*exp(-x.^2-(y+1).^2);
                ^ you need this .

Read about the difference here:

https://www.mathworks.com/help/matlab/matlab_prog/array-vs-matrix-operations.html

Answer 2

[KSSV]

x=linspace(-3,3,49); 
y=linspace(-3,3,49); 
[X,Y] = meshgrid(x,y) ;
funk1=3*((1-X).^2).*exp(-X.^2-(Y+1).^2); 
surf(X,Y,funk1)

Answer 3

[Rik]

The error explains exactly what is wrong: "Error using * Inner matrix dimensions must agree."

You forgot the dot for element-wise multiplying before the exp.

x=linspace(-3,3,49);
y=linspace(-3,3,49);
funk1=3*((1-x).^2).*exp(-x.^2-(y+1).^2);

Answer 4

[Dennis Semke]

Ou ok now it works. Big ty :) I rly dont saw it and made me angry :'D