spiderplot(X, axisMax, axisMin, colors)

SPIDERPLOT(X), where X is a M times N matrix, plots N radar plots to a figure with M axis.
SPIDERPLOT(X [MxN], AXISMAX [Mx1], AXISMIN [Mx1], COLORS [Nx1 or Nx3]) uses AXISMIN and AXISMAX to scale the axis, and COLORS as the colors of the radar plots.
To use default values, pass [] to AXISMIN, AXISMAX, and COLORS.
This function uses GLYPHPLOT from Statistics Toolbox. MATLAB version 2007a or later is required (with versions R14-2006b one has to edit line 276 of glyphplot.m by changing the %-sign to &&).

HOLD doesn't work, sorry.

The picture attached can be produced by

h = spiderplot(magic(5)+10, ...
[35 40 45 50 55], ...
[0 2 4 6 8], ['r' 'g' 'b']');
set(h.axis, 'LineWidth', 2);
set(h.plots, 'LineWidth', 2);