
Re: Very simple question
Posted:
Apr 10, 2014 3:08 AM


Stephen 
Don't try to pass off a lower case ell as a one. Change fx[ptl_] to fx[pt1_]
 Dave Snead
Original Message From: Ste[hen Gray Sent: Wednesday, April 09, 2014 1:14 AM Subject: Very simple question
I've been away from Mathematica for about 7 years. Can anyone tell me why function fx gives an error message but fy does not? They look functionally the same to me. Please send me an email about this.
fx[ptl_] := Module[{x1, y1, x2, y2, x3, y3}, Print[pt1]; x1 = pt1[[1, 1]]; y1 = pt1[[1, 2]]; x2 = pt2[[2, 1]]; y2 = pt2[[2, 2]]; x3 = pt3[[3, 1]]; y3 = pt3[[3, 2]]; Print[x1, y1, x2, y2, x3, y3]; ] fx[{{1, 2}, {3, 5}, {4, 7}}]
fy[pt1_] := Module[{zz, x1, y1, x2, y2, x3, y3}, zz = pt1; Print[zz]; x1 = zz[[1, 1]]; y1 = zz[[1, 2]]; x2 = zz[[2, 1]]; y2 = zz[[2, 2]]; x3 = zz[[3, 1]]; y3 = zz[[3, 2]]; Print[x1, y1, x2, y2, x3, y3] ] fy[{{1, 2}, {3, 5}, {4, 7}}]
Thank you. Steve Gray stevebg@roadrunner.com

