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Release calc version 2.12.4.4
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107
cal/gvec.cal
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107
cal/gvec.cal
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/*
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* gvec - vectorize any single-input function or trailing operator
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*
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* This version accepts arbitrary number of arguments, but of course
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* they must all be same length vectors.
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*
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* The gvec function is for use in either a two-arg function or a two-arg
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* operation "function" must be first; calc doesn't care how many more
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* arguments there actually are.
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*
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* @(#) $Revision: 30.3 $
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* @(#) $Id: gvec.cal,v 30.3 2011/05/23 23:00:55 chongo Exp $
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* @(#) $Source: /usr/local/src/cmd/calc/cal/RCS/gvec.cal,v $
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*
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* Under source code control: 2011/03/31 17:54:55
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* File existed as early as: 2010
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*
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* By Carl Witthoft carl at witthoft dot com
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*/
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define gvec(function, vector)
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{
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local xlen,y,foo;
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local precx = 1e-50; /* default for now */
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local argc = param(0)-1;
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local old_tilde; /* previous config("tilde") */
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/*
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* parse args
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*/
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local plist = mat[argc];
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if (config("resource_debug") & 8) {
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print "plist=", plist;
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print "argc=", argc;
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}
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for(local i = 0; i< argc; i++) {
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local ii = i + 2;
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if (config("resource_debug") & 8) {
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print "ii=", ii;
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print "param(" : ii : "}=", param(ii);
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print "size(param(" : ii : ")=", size(param(ii));
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}
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plist[i] = size(param(ii));
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}
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local slist=sort(plist);
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if (config("resource_debug") & 8) {
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print "plist=", plist;
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}
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local argm = argc-1;
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if (config("resource_debug") & 8) {
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print "argm=", argm;
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}
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if (slist[0] != slist[argm]) {
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quit "lengths don't match";
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}
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xlen = size(vector);
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y = mat[xlen];
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/*
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* We can't do str(vector[j]) outside loop, eval() petulantly refuses to
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* look at local variables.
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*
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* Also we need to config("tilde",0) to turn off lead tilde
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* (so str(vector[j]) looks like a number.
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*/
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old_tilde = config("tilde",0);
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/*
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* Ok, now check to see if "function" is a function. If not, it's an
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* operation and it's up to user to make it valid
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*/
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if (isdefined(function)) {
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/* yep, it's a function, either builtin or user-defined */
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for (local j=0; j<xlen; j++) {
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/* build the function call */
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foo = strcat(function, "(");
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for (local jj = 0; jj<argc; jj++) {
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foo = strcat(foo , str(param(jj+2)[j]), ",");
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}
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foo = strcat(foo, str(precx), ")");
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if (config("resource_debug") & 8) {
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print "foo=", foo;
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}
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y[j] = eval(foo);
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}
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/*
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* it is an operator -- multi-argument operator makes no sense
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*/
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} else {
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if (argc > 1) {
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quit "Error: operator can accept only one argument";
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}
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for (j=0; j<xlen; j++) {
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foo = strcat(str(vector[j]), function);
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y[j] = eval(foo);
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}
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}
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/* restore tilde mode if needed */
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config("tilde", old_tilde);
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/* return result */
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return y;
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}
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