graphing a gaussian fit of data, invalid use of operator

I am trying to fit a gaussian curve to some data. dmax, a, Xo, S and dmin are all 1x1 doubles. I want to have the curve centered around Xo. however when I run the code it highlights the "-Xo" and says invalid use of operator. (I am pretty new to coding)

    x = xmin:0.001:xmax;
    G = (1/dmax)*exp(((a*(x.-Xo)^2))/(2*S^2)) + dmin;
    plot(x,G);

[Allen]

One issue with syntax that am noticing is that you have placed a dot '.' oprerator in front of your minus '-' operator which may be causing the issue. If you are trying to perform element-wise calculations on vectors or arrays, you may need to include the dot '.' operator elsewhere in your equation, but it does not work in front of minus '-' and plus '+' math operators.

If removing the dot '.' operator from the equation does not fix the problem, can you provide a screen-shot of your workspace similar too the example below? Include all variables used in the equation for G, it would help us to understand what you are needing to accomplish.

[todd eliason]

I fixed the problem by centering my x values on zero before I use the gaussian function. So I used the ".*" operation to square it.

Answer 1

[KALYAN ACHARJYA]

"however when I run the code it highlights the "-Xo" and says invalid use of operator."

G = (1/dmax)*exp(((a*(x.(-Xo))^2))/(2*S^2)) + dmin;
%........................^(  ).......