fontsize
Syntax
Description
fontsize( sets
the font size and font units for all of the text within the current figure. If the figure
contains other graphics objects, such as UI components or an axes object with a legend,
size,units)fontsize also sets the font size and font units for those objects in
the figure. Font units can be "points", "pixels",
"inches", or "centimeters".
Before R2023a: All syntaxes require a graphics object as the
first input, such as
fontsize(.obj,size,units)
fontsize( increases the font size
by a factor of 1.1."increase")
fontsize( decreases the font size
by a factor of 0.9."decrease")
fontsize(scale= scales the font size
by a factor of sfactor)sfactor. For example, use a scale factor of
1.2 to scale by 120%.
fontsize( resets the font size and
font units to the default, automatic values."default")
Examples
Create a plot containing two lines with a title and a legend.
plot([0 1; 1 2]) title("Two Very Straight Lines") legend("Blue Line","Red Line")
Increase the font size to 16 points.
fontsize(16,"points")
Before R2023a: Specify gcf as the first argument to the fontsize function. For example, fontsize(gcf,16,"points").
Create a plot with several text elements of varying font sizes.
[X,Y,Z] = peaks; contourf(X,Y,Z,LineColor="#4F4F4F") title("Peak Elevation") colorbar annotation("textarrow",[.53 .41],[.65 .47],String="Local maxima") annotation("textarrow",[.53 .59],[.65 .55])
Scale the font sizes in the figure by 120% by using a scale factor of 1.2. The fontsize function scales each font size individually, maintaining the relative sizes of the fonts.
fontsize(gcf,scale=1.2)
Create a tiling of several plots by using the tiledlayout and nexttile functions.
x = linspace(0,3*pi,200); y = cos(x) + rand(1,200); t = tiledlayout(2,2); % Top scatter plot in tiles 1,2 ax1 = nexttile([1 2]); scatter(x,y) title("Random Variance on Cosine") % Lower polar plot in tile 3 ax2 = nexttile; plot(x,cos(x)+0.5) % Lower histogram in tile 4 ax3 = nexttile; histogram(y,20)
Scale up the font size of the scatter plot, and change the font size of the other two plots to 10 pixels.
fontsize(ax1,scale=1.2)
fontsize([ax2 ax3],10,"pixels")
To undo the font size changes across all the tiled plots, reset the font sizes and units to their default values. Apply this change to all three plots by using the current figure object returned by gcf.
fontsize(gcf,"default")
Create the following function file, and save it as myapplayout.m on your MATLAB® path. This function returns the layout for a simple app to plot data using different plot types.
function fig = myapplayout % Create figure window fig = uifigure; % Create UI components ax = uiaxes(fig,Position=[15 70 535 340]); lbl = uilabel(fig,Position=[30 15 100 35],Text="Choose Plot Type:"); b1 = uibutton(fig,Position=[140 15 180 35],Text="Surf"); b2 = uibutton(fig,Position=[350 15 180 35],Text="Mesh"); % Configure UI component appearance surf(ax,peaks); fontsize(fig,8,"pixels") title(ax,"Peak Surface",FontSize=11) end
Call the function and assign the returned figure object to f.
f = myapplayout;
Use f to increase the font size of all text in the figure until it is more easily readable. Here, the fontsize function increases each font size individually by a scale factor of 1.1, maintaining the relative sizes of the fonts.
fontsize(f,"increase") fontsize(f,"increase") fontsize(f,"increase")
