How do I specify multiple data sets to an XY-scatter plot using the Google Chart API?

Question

Why doesn't this Google Chart API URL render both data sets on this XY scatter plot?

http://chart.apis.google.com/chart?cht=lxy&chd=t:10,20,30,40,50,60,70,80,90,100,110,120,130,140,150,160,170,180,190,200|0.10,0.23,0.33,0.44,0.56,0.66,0.79,0.90,0.99,1.12,1.22,1.33,1.44,1.56,1.68,1.79,1.90,2.02,2.12,2.22|0.28,0.56,0.85,1.12,1.42,1.68,1.97,2.26,2.54,2.84,3.12,3.40,3.84,4.10,4.53,4.80,5.45,6.02,6.40,6.80&chco=3072F3,ff0000,00aaaa&chls=2,4,1&chs=320x240&chds=0,201,0,7&chm=s,FF0000,0,-1,5|s,0000ff,1,-1,5|s,00aa00,2,-1,5

I've read the documentation over and over again, and I can't figure it out.

Answer 1

I think it actually does render both data sets, but you can only se one of them because there's only one scale on the y axis. (In other words, 0.10 is too small to show.)

And, you should really be using percentages. 100 is the highest accepted value:

Where chart data string consists of positive floating point numbers from zero (0.0) to one hundred (100.0)

Answer 2

First a point of clarification. You talk about a "XY scatter plot", but these are actually 2 distinct chart types in the Google Chart API. Your URL refers to cht=lxy parameter which is an XY line chart.

The first problem with your URL is your data parameter (chd). Since it is an XY line chart, data sets must be defined in pairs but I see an odd number of data sets (3).

Christian D's response is incorrect. There is no percentage requirement.

You may be better off using a wrapper API which abstracts away many of these ugly details.