how to convert 1x1 sym into numeric value in the workspace? in matlab

To convert a symbolic value into a numeric value, you can use the double function in MATLAB.

Here's an example code snippet:

main.m
syms x
y = x^2 + 2*x + 1;
y_numeric = double(subs(y, x, 2));
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In this example, we define a symbolic variable x, and create a symbolic expression y which represents the quadratic equation x^2 + 2x + 1.

To convert this expression into a numeric value at a specific value of x, we first use the subs function to substitute the value x=2 into the expression.

Then, we use the double function to convert this symbolic value into a numeric value. The resulting value is stored in the variable y_numeric.

Note that in order to use symbolic math in MATLAB, you will need to have the Symbolic Math Toolbox installed. Also, the above example uses a scalar input for symbolic variable x. If you want to evaluate numeric values for symbolic matrices, you can use double function to convert the matrix (or array) after subs.