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To display many small graphics one above the another (like Edward Tufte's sparklines), I'd like to use layout in the graphics package with more than 15 rows. I found that the limit of 15 is set by #define MAX_LAYOUT_ROWS 15 in https://svn.r-project.org/R/trunk/src/include/Graphics.h but I 'm not familiar enough with compilers to modify this. Thank you for all help Jeroen

...d and inverse Fourier equation pair, but just no clue on numerical method. A working code on this simplest exercise would clear off many, many of my confusions I have generated CF with t of 256 points equally spaced between -4 to 4 in Excel, but don't know how to proceed. Thanks for your help! Jindan

Frank Harrell suggested I re-post with information about the version of R Heres's the information: > > version > _ > platform powerpc-apple-darwin6.8 > arch powerpc > os darwin6.8 > system powerpc, darwin6.8 > status > major 2 > minor 0.1 > year 2004 > month 11 > day 15 > language R Here's what happens