Click on the gradient preview area in the Layer Style dialog box to choose a new gradient. This brings up the Gradient Picker , showing us all the available gradients we can choose from. The one we want is the Black, White gradient, third from the left, top row.
MATLAB is a technical computer program use for data processing and data visualization. When plotting data it is often necessary to plot a horizontal line through a specific point to emphasize a particular point or area.