creating a function with a condition set

How do I create this function in Matlab? All of the tutorials seem to use very simple syntax in the functions.

f(t) = {

[Hollie Pietsch]

It should show this function, but for some reason it shows blank.

f(t) = {

[Walter Roberson]

Perhaps post an image of the formula.

[Hollie Pietsch]

Answer 1

[Walter Roberson]

If you have Symbolic Toolbox and R2016b or later, you can use piecewise

Otherwise, you need something like

function ft = f(t)
  ft = nan(size(t));
  mask = t >= 0 & t < 2;
  ft(mask) = t(mask) - 1;
  mask = t >= 2 & t < 4;
  ft(mask) = 3 - t(mask);

Notice the nan: your function definition does not define any value for t outside of [0, 4) so no number can be assigned for those cases.