Improper data source detection

Dygraphs automatically detects if a CSV is the data source by means of checking the file name for a line break. If a line break isn't present, then it decides it's a CSV and looks for the file on the system.

Instead of having this automatic detection, it would make more sense to specify the data source.

This would make it possible to use JavaScript strings containing CSV data as a data source. Currently these variables are treated as files rather than strings and are searched for on the system. (returning 404)

[danvk]

Can you provide an example where a multiline CSV is being treated as a file name? dygraphs should work in the way you describe:

dygraphs/auto_tests/tests/multi_csv.js

Lines 22 to 38 in 6d28d02

	it('testOneCSV', function() {
	var opts = {
	width: 480,
	height: 320
	};
	var data = "X,Y\n" +
	"0,-1\n" +
	"1,0\n" +
	"2,1\n" +
	"3,0\n"
	;
	var graph = document.getElementById("graph");
	var g = new Dygraph(graph, data, opts);
	assert.deepEqual(['0', '1', '2'], getXLabels());
	});