Category Archives: Tips & Tricks
ezproxy redirect bookmarklet
A while ago I wrote a Google Toolbar button for redirecting the current page to the same page accessed through an EZproxy server. As I was missing this functionality in browsers without Google Toolbar (it’s still not available in Google Chrome), I realized that it’s a very simple thing to do with a bookmarklet. Here [...]
XML parsing with Perl using XPath
use strict;
use XML::LibXML;
# data source
my $xml_filename = "xml/data.xml";
my $parser = XML::LibXML->new;
my $doc = $parser->parse_file($xml_filename);
my $xpath = "//word/entry[\@src=\"pr\"]/..";
my @words = $doc->findnodes($xpath);
foreach my $word (@words) {
print $word->findvalue("\@id");
print "\n";
}
XSLT transform with Perl
Here is a Perl snippet that transforms an XML file with XSLT:
use strict;
use XML::XSLT::Wrapper;
my $xml_input_filename = "xml/data.xml";
my $xml_output_filename = "xml/out.xml";
my $xsl_filename = "xml/transform.xslt";
my $xslt = XML::XSLT::Wrapper->new(
ProcessorList => [
'libxslt',
'sablotron',
'xslt'
],
);
my $result = $xslt->transform(
OutFile => $xml_output_filename,
xml => $xml_input_filename,
xsl => $xsl_filename,
);
$xslt->dispose();
Sitemap generator configuration for Blogger
If you are using Google’s sitemap generator [code]]czoxNDpcInNpdGVtYXBfZ2VuLnB5XCI7e1smKiZdfQ==[[/code] to generate a sitemap of your Blogger blog , here are the configuration lines to add to the config.xml file:
Function call counting in Matlab
Here’s a neat way to keep track of the cost, i.e. number of function calls in Matlab: rather than using a counter variable and increment it each time a function is called, use the internal Matlab counters, accessible through the FunctionTable struct array.
The loop below is necessary only to get the index of the [...]
Images in LaTeX
Problem:
you can’t get those images to appear in a typeset document.
Cause:
[code]]czo4OlwicGRmbGF0ZXhcIjt7WyYqJl19[[/code] and [code]]czo1OlwibGF0ZXhcIjt7WyYqJl19[[/code] have virtually no graphic drivers in common. For instance, [code]]czo4OlwicGRmbGF0ZXhcIjt7WyYqJl19[[/code] can't handle eps files.
Solution:
I converted my eps files to pdf using a thing called [code]]czo4OlwiZXBzdG9wZGZcIjt7WyYqJl19[[/code], which is included in latex distributions, and [code]]czo4OlwicGRmbGF0ZXhcIjt7WyYqJl19[[/code] handled those pdf graphs perfectly, so that the output [...]
Also posted in LaTeX Leave a comment
Create a symmetric matrix in Mathematica