plotScalingInfo – Add scaling / dimensioning arrow to plot

plotScalingInfo – Add scaling / dimensioning arrow to plot

Draws a true to scale arrow that shows the scaling. Useful when y axis tick labels are to be omitted.

This function adds a scaling information to a plot.
The arguments are property-value pairs.
All of them are optional; default values will be used then.

Use cases:
- Plot many channels vertically stacked (non-overlapping) as with plotECG()
- y axis has no natural origin (zero), only differences matter
- want to omit y axis ticks & tick labels for more clarity

Attention: The scaling information does not update if you zoom the axes!
The position of the scaling information is fixed in normalized units relative to the figure.

Properties:
'Axes' : Axes handle (default: gca)
'Size' : Size of the scaling info relative to axis data units (default: 1)
'String' : Information string (default: '')
'Position' : (1 x 2) vector with the position relative to axes: [x,y] (default: [0.97,0.12])
'HeadSize' : (1 x 2) vector with the rectangular head size: [width,length] (default: [15,1])
'LineWidth' : Line width (default: 2)
'Color' : Line color (default: 'black')
'FontSize' : Font size (default: 20)

Output arguments:
- hnd(1) : handle of doublearrow annotation
- hnd(2) : handle of textarrow annotation

Usage example:
>> figure; plot(1:10)
>> hnd = plotScalingInfo('Size',5, 'String','5mV', 'Position',[0.9,0.2]);
>> hnd(2).VerticalAlignment = 'top';