How can I set variables for a function and then plot the results of the function vs the variable

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ms38 2020-11-7

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https://ww2.mathworks.cn/matlabcentral/answers/639650-how-can-i-set-variables-for-a-function-and-then-plot-the-results-of-the-function-vs-the-variable

编辑： Uday Pradhan 2020-11-11

I am investigating the trace of a matrix, I wish to change some parameters (x and z) in the matrix and from there I want to calculate the eigenvalues and then sum the eigenvalues together to get the trace. I am thinking of creating a characteristic polynomial for my matrix A and then solving the characteristic polynomial for the eigenvalues. Then I will sum the eigenvalue vector to get the trace. How can I change the values of the x and z parameters in my matrix in matlab and then how can I create a plot where the trace is on one axis and the value of the variable parameter is on the other?