6f5ac0886db21eaeb6d4d158c85bbf60527761e1
kent
  Mon Jan 11 18:07:07 2021 -0800
Fixed usage statement per code review #26745

diff --git src/utils/matrixScale/matrixScale.c src/utils/matrixScale/matrixScale.c
index a6916b8..7a10bdf 100644
--- src/utils/matrixScale/matrixScale.c
+++ src/utils/matrixScale/matrixScale.c
@@ -1,76 +1,76 @@
 /* matrixScale - Scale a matrix by a constant number.. */
 #include "common.h"
 #include "linefile.h"
 #include "hash.h"
 #include "options.h"
 #include "sqlNum.h"
 
 void usage()
 /* Explain usage and exit. */
 {
 errAbort(
   "matrixScale - Scale a matrix by a constant number.\n"
   "usage:\n"
   "   matrixScale in.tsv scale out.tsv\n"
   "where in and out are labeled matrices and scale is a floating point number\n"
   "options:\n"
-  "   -unlabeled - don't scale first row or column\n"
+  "   -unlabeled - do scale first row or column\n"
   );
 }
 
 /* Command line validation table. */
 static struct optionSpec options[] = {
    {"unlabeled", OPTION_BOOLEAN},
    {NULL, 0},
 };
 
 void matrixScale(char *input, char *scaleString, char *output)
 /* matrixScale - Scale a matrix by a constant number.. */
 {
 boolean unlabeled = optionExists("unlabeled");
 double scale = sqlDouble(scaleString);
 struct lineFile *lf = lineFileOpen(input, TRUE);
 char *line;
 FILE *f = mustOpen(output, "w");
 if (!unlabeled)
     {
     lineFileNeedNext(lf, &line, NULL);
     fprintf(f, "%s\n", line);
     }
 while (lineFileNext(lf, &line, NULL))
     {
     boolean first = TRUE;
     char *word;
     if (!unlabeled)
 	{
 	word = nextWord(&line);
 	fprintf(f, "%s", word);
 	first = FALSE;
 	}
     while ((word = nextWord(&line)) != NULL)
         {
 	if (!first)
 	   fprintf(f, "\t");
         first = FALSE;
 	if (word[0] == '0' && word[1] == 0)  // special case zero string */
 	   fprintf(f, "0");
 	else
 	   {
 	   double val = sqlDouble(word);
 	   fprintf(f, "%g", val*scale);
 	   }
 	}
     fprintf(f, "\n");
     }
 carefulClose(&f);
 }
 
 int main(int argc, char *argv[])
 /* Process command line. */
 {
 optionInit(&argc, argv, options);
 if (argc != 4)
     usage();
 matrixScale(argv[1], argv[2], argv[3]);
 return 0;
 }