Return to boyhts3.g CVS log

Up to [Research Unix] / researchv10dc / vol2 / grap

Annotation of researchv10dc/vol2/grap/boyhts3.g, revision 1.1.1.1

1.1       root        1: .G1
                      2: label left "Heights in Feet" "(Median and" "fifth percentiles)"
                      3: label bot "Heights of Boys in U.S., ages 2 to 18"
                      4: cmpft = 30.48  # Centimeters per foot
                      5: minx = 1e12; maxx = -1e12
                      6: n = sigx = sigx2 = sigy = sigxy = 0
                      7: copy "boyhts.d" thru {
                      8:        line from $1, $2/cmpft to $1, $4/cmpft
                      9:        ty = $3/cmpft
                     10:        bullet at $1,ty
                     11:        n = n+1
                     12:        sigx = sigx+$1; sigx2 = sigx2+$1*$1
                     13:        sigy = sigy+ty; sigxy = sigxy+$1*ty
                     14:        minx = min(minx,$1); maxx = max(maxx,$1)
                     15: }
                     16: # Calculate least squares fit and draw it
                     17: slope = (n*sigxy - sigx*sigy) / (n*sigx2 - sigx*sigx)
                     18: inter = (sigy - slope*sigx) / n
                     19: line from minx, slope*minx+inter to maxx, slope*maxx+inter
                     20: .G2

This archive runs on limited infrastructure. Preserving old code on modern bandwidth. Automated agents are requested to crawl responsibly.