:: O-Matrix ::
 > Overview > Examples > Performance > Analysis Functions > Data Visualization > The O-Matrix Language > Data Manipulation/IO > Application Development > Using Matlab m-files

 TTAILX.OMS Script File: ```# Description: # Computes the tail probability for the T statistic. # clear # grid of values for T statistic t = seq(100) / 10. # axis for T statistic gxaxis("linear", 0, 10, 10, 5) # axis for tail probability gyaxis("linear", 0, .2, 2, 10) # degrees of freedom df = [1, 2, 4, 7] # titles gxtitle("T") gytitle("probability") for i = 1 to coldim(df) begin # degrees of freedom d = fill(df(i), 100, 1) # probability p = ttail(t, d) # plot probability as a function of t gplot(t, p) # derivative of p with respect to t dpdt = coldiff(p) / coldiff(t) # points where dpdt >= -.1 / 10. flag = dpdt >= -.1 / 10. # determine corresponding indices in t and p index = seq(99) + 1 index = index.row(flag) # location of first point where dpdt >= -.1 / 10. coord = gcoord(t(index(1)), p(index(1))) # label curve with degrees of freedom text = ntoa(df(i)) gaddtext(text, coord, [.5, .5]); end ``` Output:
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