A Triangle function () is a linear increase and linear decline within an interval and 0 everywhere else. You can use the triangle function for band-pass filtering, for example; that is, use it to select values within an interval. The triangle function is a function of one variable (the time t, for example). The default Function name is tri1.

Enter a Lower limit (default: −0.5), Upper limit (default: 0.5), Baseline (default: 0) and Amplitude (default: 1) to define the triangle function. This function evaluates to the amplitude plus the baseline for values within the interval from the lower limit to the upper limit. Outside the interval it evaluates to the baseline. For example, if the input argument is time, enter a start and end time. In the midpoint of the interval, this function evaluates to the amplitude value (plus any baseline value), and moving toward the interval boundaries it falls off to the baseline value. Outside the interval it evaluates to the baseline value. You can use unit syntax to assign units to these parameters.