in reply to Re: simple html trend line
in thread simple html trend line

If so, did you try running the synopsis code?

And if so, did you get a whole bunch of warnings when you ran it?:

C:\test>SVG-t.pl > test.svg
Use of uninitialized value $_ in addition (+) at C:/perl64/site/lib/St
+atistics/Descriptive.pm line 151.
Use of uninitialized value $_ in exponentiation (**) at C:/perl64/site
+/lib/Statistics/Descriptive.pm line 1
Use of uninitialized value $max in numeric ge (>=) at C:/perl64/site/l
+ib/Statistics/Descriptive.pm line 154
Use of uninitialized value $_ in numeric ge (>=) at C:/perl64/site/lib
+/Statistics/Descriptive.pm line 154.
Use of uninitialized value $min in numeric le (<=) at C:/perl64/site/l
+ib/Statistics/Descriptive.pm line 158
Use of uninitialized value $_ in numeric le (<=) at C:/perl64/site/lib
+/Statistics/Descriptive.pm line 158.
Use of uninitialized value $_ in addition (+) at C:/perl64/site/lib/St
+atistics/Descriptive.pm line 151.
Use of uninitialized value $_ in exponentiation (**) at C:/perl64/site
+/lib/Statistics/Descriptive.pm line 1
Use of uninitialized value $max in numeric ge (>=) at C:/perl64/site/l
+ib/Statistics/Descriptive.pm line 154
Use of uninitialized value $_ in numeric ge (>=) at C:/perl64/site/lib
+/Statistics/Descriptive.pm line 154.
Use of uninitialized value $min in numeric le (<=) at C:/perl64/site/l
+ib/Statistics/Descriptive.pm line 158
Use of uninitialized value $_ in numeric le (<=) at C:/perl64/site/lib
+/Statistics/Descriptive.pm line 158.
Use of uninitialized value $_ in addition (+) at C:/perl64/site/lib/St
+atistics/Descriptive.pm line 151.
Use of uninitialized value $_ in exponentiation (**) at C:/perl64/site
+/lib/Statistics/Descriptive.pm line 1
Use of uninitialized value $max in numeric ge (>=) at C:/perl64/site/l
+ib/Statistics/Descriptive.pm line 154
Use of uninitialized value $_ in numeric ge (>=) at C:/perl64/site/lib
+/Statistics/Descriptive.pm line 154.
Use of uninitialized value $min in numeric le (<=) at C:/perl64/site/l
+ib/Statistics/Descriptive.pm line 158
Use of uninitialized value $_ in numeric le (<=) at C:/perl64/site/lib
+/Statistics/Descriptive.pm line 158.
Use of uninitialized value $_ in addition (+) at C:/perl64/site/lib/St
+atistics/Descriptive.pm line 151.
Use of uninitialized value $_ in exponentiation (**) at C:/perl64/site
+/lib/Statistics/Descriptive.pm line 1
Use of uninitialized value $max in numeric ge (>=) at C:/perl64/site/l
+ib/Statistics/Descriptive.pm line 154
Use of uninitialized value $_ in numeric ge (>=) at C:/perl64/site/lib
+/Statistics/Descriptive.pm line 154.
Use of uninitialized value $min in numeric le (<=) at C:/perl64/site/l
+ib/Statistics/Descriptive.pm line 158
Use of uninitialized value $_ in numeric le (<=) at C:/perl64/site/lib
+/Statistics/Descriptive.pm line 158.
Use of uninitialized value $_ in addition (+) at C:/perl64/site/lib/St
+atistics/Descriptive.pm line 151.
Use of uninitialized value $_ in exponentiation (**) at C:/perl64/site
+/lib/Statistics/Descriptive.pm line 1
Use of uninitialized value $max in numeric ge (>=) at C:/perl64/site/l
+ib/Statistics/Descriptive.pm line 154
Use of uninitialized value $_ in numeric ge (>=) at C:/perl64/site/lib
+/Statistics/Descriptive.pm line 154.
Use of uninitialized value $min in numeric le (<=) at C:/perl64/site/l
+ib/Statistics/Descriptive.pm line 158
Use of uninitialized value $_ in numeric le (<=) at C:/perl64/site/lib
+/Statistics/Descriptive.pm line 158.
Use of uninitialized value $min in subtraction (-) at C:/perl64/site/l
+ib/Statistics/Descriptive.pm line 168
Use of uninitialized value $max in subtraction (-) at C:/perl64/site/l
+ib/Statistics/Descriptive.pm line 168
Use of uninitialized value in multiplication (*) at C:/perl64/site/lib
+/SVG/Graph/Glyph/axis.pm line 76.
Use of uninitialized value in multiplication (*) at C:/perl64/site/lib
+/SVG/Graph/Glyph/axis.pm line 76.
Use of uninitialized value in multiplication (*) at C:/perl64/site/lib
+/SVG/Graph/Glyph/axis.pm line 92.
Use of uninitialized value $txt[0] in join or string at C:/perl64/site
+/lib/SVG/Element.pm line 581.
Use of uninitialized value $txt[0] in join or string at C:/perl64/site
+/lib/SVG/Element.pm line 581.
Use of uninitialized value in multiplication (*) at C:/perl64/site/lib
+/SVG/Graph/Glyph/axis.pm line 76.
Use of uninitialized value in multiplication (*) at C:/perl64/site/lib
+/SVG/Graph/Glyph/axis.pm line 76.
Use of uninitialized value in multiplication (*) at C:/perl64/site/lib
+/SVG/Graph/Glyph/axis.pm line 92.
Use of uninitialized value $txt[0] in join or string at C:/perl64/site
+/lib/SVG/Element.pm line 581.
Use of uninitialized value $txt[0] in join or string at C:/perl64/site
+/lib/SVG/Element.pm line 581.
Use of uninitialized value in multiplication (*) at C:/perl64/site/lib
+/SVG/Graph/Glyph/axis.pm line 76.
Use of uninitialized value in multiplication (*) at C:/perl64/site/lib
+/SVG/Graph/Glyph/axis.pm line 76.
Use of uninitialized value in multiplication (*) at C:/perl64/site/lib
+/SVG/Graph/Glyph/axis.pm line 92.
Use of uninitialized value $txt[0] in join or string at C:/perl64/site
+/lib/SVG/Element.pm line 581.
Use of uninitialized value $txt[0] in join or string at C:/perl64/site
+/lib/SVG/Element.pm line 581.
Use of uninitialized value in multiplication (*) at C:/perl64/site/lib
+/SVG/Graph/Glyph/axis.pm line 76.
Use of uninitialized value in multiplication (*) at C:/perl64/site/lib
+/SVG/Graph/Glyph/axis.pm line 76.
Use of uninitialized value in multiplication (*) at C:/perl64/site/lib
+/SVG/Graph/Glyph/axis.pm line 92.
Use of uninitialized value $txt[0] in join or string at C:/perl64/site
+/lib/SVG/Element.pm line 581.
Use of uninitialized value $txt[0] in join or string at C:/perl64/site
+/lib/SVG/Element.pm line 581.
Use of uninitialized value in multiplication (*) at C:/perl64/site/lib
+/SVG/Graph/Glyph/axis.pm line 76.
Use of uninitialized value in multiplication (*) at C:/perl64/site/lib
+/SVG/Graph/Glyph/axis.pm line 76.
Use of uninitialized value in multiplication (*) at C:/perl64/site/lib
+/SVG/Graph/Glyph/axis.pm line 92.
Use of uninitialized value $txt[0] in join or string at C:/perl64/site
+/lib/SVG/Element.pm line 581.
Use of uninitialized value $txt[0] in join or string at C:/perl64/site
+/lib/SVG/Element.pm line 581.
Use of uninitialized value in multiplication (*) at C:/perl64/site/lib
+/SVG/Graph/Glyph/axis.pm line 154.
Use of uninitialized value in multiplication (*) at C:/perl64/site/lib
+/SVG/Graph/Glyph/axis.pm line 154.
Use of uninitialized value in multiplication (*) at C:/perl64/site/lib
+/SVG/Graph/Glyph/axis.pm line 168.
Use of uninitialized value $txt[0] in join or string at C:/perl64/site
+/lib/SVG/Element.pm line 581.
Use of uninitialized value $txt[0] in join or string at C:/perl64/site
+/lib/SVG/Element.pm line 581.
Use of uninitialized value in multiplication (*) at C:/perl64/site/lib
+/SVG/Graph/Glyph/axis.pm line 154.
Use of uninitialized value in multiplication (*) at C:/perl64/site/lib
+/SVG/Graph/Glyph/axis.pm line 154.
Use of uninitialized value in multiplication (*) at C:/perl64/site/lib
+/SVG/Graph/Glyph/axis.pm line 168.
Use of uninitialized value $txt[0] in join or string at C:/perl64/site
+/lib/SVG/Element.pm line 581.
Use of uninitialized value $txt[0] in join or string at C:/perl64/site
+/lib/SVG/Element.pm line 581.
Use of uninitialized value in multiplication (*) at C:/perl64/site/lib
+/SVG/Graph/Glyph/axis.pm line 154.
Use of uninitialized value in multiplication (*) at C:/perl64/site/lib
+/SVG/Graph/Glyph/axis.pm line 154.
Use of uninitialized value in multiplication (*) at C:/perl64/site/lib
+/SVG/Graph/Glyph/axis.pm line 168.
Use of uninitialized value $txt[0] in join or string at C:/perl64/site
+/lib/SVG/Element.pm line 581.
Use of uninitialized value $txt[0] in join or string at C:/perl64/site
+/lib/SVG/Element.pm line 581.
Use of uninitialized value in multiplication (*) at C:/perl64/site/lib
+/SVG/Graph/Glyph/axis.pm line 154.
Use of uninitialized value in multiplication (*) at C:/perl64/site/lib
+/SVG/Graph/Glyph/axis.pm line 154.
Use of uninitialized value in multiplication (*) at C:/perl64/site/lib
+/SVG/Graph/Glyph/axis.pm line 168.
Use of uninitialized value $txt[0] in join or string at C:/perl64/site
+/lib/SVG/Element.pm line 581.
Use of uninitialized value $txt[0] in join or string at C:/perl64/site
+/lib/SVG/Element.pm line 581.
Use of uninitialized value in multiplication (*) at C:/perl64/site/lib
+/SVG/Graph/Glyph/axis.pm line 154.
Use of uninitialized value in multiplication (*) at C:/perl64/site/lib
+/SVG/Graph/Glyph/axis.pm line 154.
Use of uninitialized value in multiplication (*) at C:/perl64/site/lib
+/SVG/Graph/Glyph/axis.pm line 168.
Use of uninitialized value $txt[0] in join or string at C:/perl64/site
+/lib/SVG/Element.pm line 581.
Use of uninitialized value $txt[0] in join or string at C:/perl64/site
+/lib/SVG/Element.pm line 581.
Use of uninitialized value in multiplication (*) at C:/perl64/site/lib
+/SVG/Graph/Glyph/axis.pm line 154.
Use of uninitialized value in multiplication (*) at C:/perl64/site/lib
+/SVG/Graph/Glyph/axis.pm line 154.
Use of uninitialized value in multiplication (*) at C:/perl64/site/lib
+/SVG/Graph/Glyph/axis.pm line 168.
Use of uninitialized value $txt[0] in join or string at C:/perl64/site
+/lib/SVG/Element.pm line 581.
Use of uninitialized value $txt[0] in join or string at C:/perl64/site
+/lib/SVG/Element.pm line 581.
Use of uninitialized value in multiplication (*) at C:/perl64/site/lib
+/SVG/Graph/Glyph/axis.pm line 154.
Use of uninitialized value in multiplication (*) at C:/perl64/site/lib
+/SVG/Graph/Glyph/axis.pm line 154.
Use of uninitialized value in multiplication (*) at C:/perl64/site/lib
+/SVG/Graph/Glyph/axis.pm line 168.
Use of uninitialized value $txt[0] in join or string at C:/perl64/site
+/lib/SVG/Element.pm line 581.
Use of uninitialized value $txt[0] in join or string at C:/perl64/site
+/lib/SVG/Element.pm line 581.
Use of uninitialized value in multiplication (*) at C:/perl64/site/lib
+/SVG/Graph/Glyph/axis.pm line 154.
Use of uninitialized value in multiplication (*) at C:/perl64/site/lib
+/SVG/Graph/Glyph/axis.pm line 154.
Use of uninitialized value in multiplication (*) at C:/perl64/site/lib
+/SVG/Graph/Glyph/axis.pm line 168.
Use of uninitialized value $txt[0] in join or string at C:/perl64/site
+/lib/SVG/Element.pm line 581.
Use of uninitialized value $txt[0] in join or string at C:/perl64/site
+/lib/SVG/Element.pm line 581.

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Re^3: (Did anyone else install SVG::Graph?
by FreeBeerReekingMonk (Deacon) on Apr 18, 2015 at 22:46 UTC

    I did, and it only worked after doing a "cpan SVG::Graph" to install the Perl Module.

    But how about this other approach: Write only the data using perl, creating an html that uses javascript libraries http://webdesignledger.com/resources/13-useful-javascript-solutions-for-charts-and-graphs to further generate the image. I used flot succesfully in the past. This way, perl only writes the html and the javascript library takes care of the plotting

    Then there is "use Image::Magick;" to create a surface and plot your points by hand, then save the graphics file, there was this node... create PNG image

    Then there is this inline graphics, I do no recommend it for this type of job: http://www.websiteoptimization.com/speed/tweak/inline-images/

    And somewhere on the web there is this table which are 1x1 pixels big, and basically, the table looks like a mspaint canvas at that size. Also not recommended, but it works.

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In Section Seekers of Perl Wisdom