Re: matrixMultiply
Gregory Lypny [EMAIL PROTECTED] asked... Hi Everyone, I'm having trouble with matrixMultiply. I've created two 1 x 20 vectors (arrays) named Prob and V. I want to compute the dot product (for example, the expected value of V in statistics), which is prob[1] x V[1] + prob[2] x V[2] + ... + prob[20] x V[20] but it's not clear whether MetaCard treats vectors as columns or rows by default. All of the following result in error messages: matrixMultiply(prob,V) matrixMultiply(transpose(prob),V) matrixMultiply(prob,transpose(V)) Any help would be much appreciated. Regards, Greg transpose does not work on single column vectors. Transpose takes the index [i,j] and replaces it with [j,i]. In your case, you need to create your vectors as prob[i,j]. Transpose ought to work then. Or you could just do this (and it might be a bit faster even): function dotp x,y if keys(x) = keys(y) then repeat for each line i in keys(x) add x[i]*y[i] to sum end repeat return sum end dotp Gregory Lypny Concordia University ___ Better for us if you don't understand. The Tragically Hip http://rubbersoul.concordia.ca Raymond ___ metacard mailing list [EMAIL PROTECTED] http://lists.runrev.com/mailman/listinfo/metacard
Re: Upload
Thank you VERY much Richard. I love examples! On Wednesday, July 24, 2002, at 01:14 AM, Richard Gaskin wrote: Simon Lord wrote: I have a great script that allows MetaCard to download a file from my server. Now I need one to upload a file to the server. Does anyone have a stack with a sample script to do this? Just a time saving question. LibURL makes it easy: put container into url ftpUrl e.g.: put ftp://; tUser:tPword@tHost/tFileName / into tDestUrl put url (file:tLocalFile) into url tDestUrl -- Richard Gaskin Fourth World Media Corporation Custom Software and Web Development for All Major Platforms Developer of WebMerge 2.0: Publish any Database on Any Site ___ [EMAIL PROTECTED] http://www.FourthWorld.com Tel: 323-225-3717 AIM: FourthWorldInc ___ metacard mailing list [EMAIL PROTECTED] http://lists.runrev.com/mailman/listinfo/metacard Sincerely, Simon ___ metacard mailing list [EMAIL PROTECTED] http://lists.runrev.com/mailman/listinfo/metacard
Darwin question
I'm drawing a HUGE blank tonight and I don't know why. I'm trying to write a darwin mt script that will write info to a field in a stack. Only it's not working. I can read info from a stack, but can't write to it. All permissions are fine. I can write to a text file with no problem. To sum it up: The script has permission to run as root. (chmod a+s) The script IS running as root (verified with whoami) The script can read from field 1 of card 1 of the test stack. The script cannot write to field 1 of card 1 of the test stack. The stack itself is set to 775 and owned by root. The script can write to a text file in the same directory as the stack. Anyone see what I'm doing wrong? I do this all the time with plain text files with no problem, but have never used stacks in this way. -- :) Richard MacLemale Network Administrator J. W. Mitchell High School ___ metacard mailing list [EMAIL PROTECTED] http://lists.runrev.com/mailman/listinfo/metacard
Re: Darwin question
Never mind. Answered my own dumb question. I was using open stack thisStack put duh into field 1 of card 1 of stack thisStackcClose stack thisStack close stack thisStack instead of open stack thisStack put duh into field 1 of card 1 of stack thisStack save stack thisStack close stack thisStack It's the little things that count. As stated in a previous post, MetaCard can read/write faster to 30 fields in a single stack than 30 individual text files, so I'm trying to use stacks to store data. And so, apparently, when writing to a text file you can do open/write/close, but when working with a stack, it's open/put/save/close. I should have known it'd be something easy... -- :) Richard MacLemale Network Administrator J. W. Mitchell High School ___ metacard mailing list [EMAIL PROTECTED] http://lists.runrev.com/mailman/listinfo/metacard
Re: Darwin question
On 7/24/02 8:28 PM, Richard MacLemale wrote: I'm trying to write a darwin mt script that will write info to a field in a stack. Only it's not working. I can read info from a stack, but can't write to it. I was trying to do something similar a while back -- use find to search stack fields -- but that wouldn't work either. Apparently you can't do any manipulation of stack objects when you aren't using the GUI. You can only read data. I had to rewrite my find routine to mechanically extract and examine the content of every field I wanted to search, since apparently the built-in find only works in the GUI. -- Jacqueline Landman Gay | [EMAIL PROTECTED] HyperActive Software | http://www.hyperactivesw.com ___ metacard mailing list [EMAIL PROTECTED] http://lists.runrev.com/mailman/listinfo/metacard
