Anyone knows the syntax to insert a dot above a greek letter in matlab?

right click on textbox - change interpreter into latex - write this $\dot{\alpha}$ in text box - this gives dot above alpha. I double checked this one and it's correct both for regular letter and greek letter. for greek letter you have to use \alpha, \beta, \gamma for example $\dot{\beta}$ $\dot{\gamma}$ $\dot{\delta}$ etc