AddLetters2Plots

Matlab function to add labels a, b, c to subplots in a figure.

AddLetters2Plots - adds labels A, B, ... to subplots in a figure.

This function adds lables to the axes. You can change the letters, define the figure or a list of axes on which you want to add letters, change the position of the letters relative to subplots (as well as positioning the letters inside or outside the subplot), and change the font size.

Syntax:

 AddLetters2Plots(fg_or_axes,Letters,Name, Value)

Inputs:

fg_or_axes - figure or a cell array of axes, by defeult is the current

figure

Letters - cell array of letters, by default {'A',...'Z'})

AddLetters2Plots(fg_or_axes,Letters,Name1, Value1,Name2, Value2, ...) 

specifies one or more of the following name/value pairs:

'FontSize'

'FontWeight' -- 'normal' | 'bold'(default)

'Color' [0 0 0] (default)

'HShift' and 'VShift' - horizontal and vertical shifts

relative shift from -1 to 1 from the upper left cornner of the axis. default = 0 positive values for plotting inside the subplots, negative for plotting outside the subplots. if HShift, VShift are vectors, then different relative shifts are defined for each axis

'Location' location of the labels

'NorthWest'(default) 'NorthEast','SouthEast', 'NorthWest','SouthWest'

'FitLocation' false (default) 'FitLocation' = true

provides a better atomatic placement of letters but is much slower because in this case drawnow function is used

'Direction' = 'LeftRight' or 'TopDown' label figures either from left

to right or from top to down

Example:

Add letters A, B to the current figure

 AddLetters2Plots

Add letters A, B to figure fg

AddLetters2Plots(fg)

Add letters (a), (b) and (c) to fg

 AddLetters2Plots(fg, {'(a)', '(b)', '(c)'})

Add (a), (b) and (c) to axis1, axis2, axis3

 AddLetters2Plots({ax1, ax2, ax3}, {'(a)', '(b)', '(c)'})  

Add default letters outside of figures, order figure labeling from from top to bottom

 AddLetters2Plots(fg, 'HShift', -0.08, 'VShift', -0.02, 'Direction', 'TopDown')

Code example

fg = figure(1);
clf
subplot(2, 2, 1)
subplot(2, 2, 2)
subplot(2, 1, 2)
legend
colorbar
AddLetters2Plots( 'HShift', [0, 0, 0], 'VShift', 0, 'Direction', 'LeftRight', 'FontSize', 10)

Add latters to some axes only

fg = figure(2);
clf
ax1 = subplot(2, 2, 1);
ax2 = subplot(2, 2, 2);
ax3 = subplot(2, 1, 2);
legend
colorbar
AddLetters2Plots({ax1, ax3}, {'A', 'B'})

Add red letters in the bottom left corner. Note in this case the letters are outside of the axes.

figure(3);
 ax1 = subplot(2, 2, 1);
 ax2 = subplot(2, 2, 2);
 ax3 = subplot(2, 1, 2);
 AddLetters2Plots('HShift', [0, 0, 0], 'VShift', 0, 'Color', 'red', ...
     'Location', 'SouthEast')

Add red letters in the bottom left corner and automatically move them into the axis boxes. SLOW!!! because of the drawnow function.

figure(4);
ax1 = subplot(2, 2, 1);
ax2 = subplot(2, 2, 2);
ax3 = subplot(2, 1, 2);
AddLetters2Plots('HShift', [0, 0, 0], 'VShift', 0, 'Color', 'red', ...
    'Location', 'SouthEast', 'FitLocation', true)