v1 = v0 * (1-(t/t).^4).^2; in matlab

To compute v1, you can use element-wise array operations in MATLAB. The expression you provided is a combination of basic arithmetic operations and element-wise operations. Here's the code:

v1 = v0 .* (1 - (t./t).^4).^2;
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In this code, .* is the element-wise multiplication operator, used to multiply the corresponding elements of two arrays. ./ is the element-wise division operator, used to divide the corresponding elements of two arrays.

The expression (t./t).^4 is simply 1 for all elements of t, since each element is divided by itself. Note that v0 and t must be arrays of the same size, or at least have compatible sizes, in order for this code to work correctly.