[R] readHTLMTable help

Duncan Temple Lang duncan at wald.ucdavis.edu
Wed Mar 28 07:51:47 CEST 2012

Hi Lucas

 The HTML page is formatted by using tables in each of the cells
of the top-most table.   As a result, the simple table is much more
complex. readHTMLTable() is intended for quick and easy tables.
For tables such as this, you have to implement more customized processors.

doc = htmlParse("")

tb = getNodeSet(doc, "//table")[[1]]

This gives the top-most table.

xmlSize(tb) tells us the number of rows. We want to skip the first 3 to get to the data.
Then in each of these you can process each row and the cells that have the data.
And the details go on....


On 3/27/12 10:57 AM, Lucas wrote:
> Hello to everyone.
> I´m using this function to download some information from a website.
> This is the URL:
> If you go to that website you´ll find a table with meteorological
> information. One column is called "Intesidad Máxima Diaria", and that is
> the one i need.
> I´ve been traying to extract that column, but I´m unable to do it.
> First I tryed simple to download the complete table and then do some kind
> of filter to extract the column but, for some reason when I call the
> function
> a<-readHTLMTable(url), the table is downloaded in a unfriendly format and I
> can not differentiate the column
> If anyone could help me I´ll appreciate it.
> Thank you.
> Lucas.
> 	[[alternative HTML version deleted]]
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