possible glitches [was: Patch for new "stats" command]

[Ethan M. <merritt@u.washington.edu>]

 On Sunday 08 November 2009, Philipp K. Janert wrote:
> We'd like to hear feedback and suggestions. Is this
> useful? Are we missing anything?
 
Some first thoughts:
=======================
-  int_error( NO_CARET,
              "Out of memory in stats: too many datapoints (%d)?", max_n );
   Can this really happen?   Does the session survive?


=========================
- What's the intent with binary data?  Simple attempt based on image.dem
  doesn't work:

gnuplot> plot 'blutux.rgb' binary array=(128,128) dx=1 flip=y rotation=0.5pi \
               origin=(0,0) format='%uchar' using ($1+$2+$3)/3 with image
gnuplot> stats 'blutux.rgb' binary array=(128,128) format='%uchar' using ($1+$2+$3)/3
                                                                                                                              ^
         Need 0 to 2 using specs for stats command


========================
- I don't know what values are being pulled from this data, 
  but the stats don't look right :-)

gnuplot> stats '-' matrix
input data ('e' ends) > 1 2 3 4 
input data ('e' ends) > 1 2 3 4 
input data ('e' ends) > 1 2 3 4 
input data ('e' ends) > 1 2 3 4 
input data ('e' ends) > e       
input data ('e' ends) > e       

* FILE:
  Records:      16
  Invalid:       0
  Blank:         3
  Data Blocks:   1

* COLUMNS:
  Mean:          1.5000             2.5000
  Std Dev:       1.1180             1.1180
  Sum x:        24.0000            40.0000
  Sum x^2:      56.0000           120.0000

  Minimum:       0.0000 [ 1]        1.0000 [ 1]
  Quartile:      1.0000 [ 2]        2.0000 [ 2]
  Median:        2.0000 [ 3]        3.0000 [ 3]
  Quartile:      3.0000 [ 4]        4.0000 [ 4]
  Maximum:       3.0000 [16]        4.0000 [16]