I understand that Timeplot does not yet handle gaps in data. Closely
related, although not exactly the same, does Timeplot handle NoData
values?
For now, all I'm thinking is skipping these records when ingesting the
data source. For multiple column/variable data sources, each column
would use the same NoData value but could be during different
events/dates. The solution would have to allow for dynamic ranges and
count/sum/avg/difference type of functions to work only on non-NoData
records. (i.e., not simply hiding those records on the graph)
I was thinking of using the 'filter' parameter or directly editing the
Timeplot.ColumnSource.prototype._process function. I tried the latter
with a simple edit (using 9999 as NoData value)
while (iterator.hasNext()) {
var event = iterator.next();
var time = event.getTime();
var value = this._getValue(event);
if (value != "9999") {
times[i] = time;
if (!isNaN(value)) {
if (value < min) {
min = value;
}
if (value > max) {
max = value;
}
values[i] = value;
}
}
i++;
}
I got the following errors:
[Exception... "An invalid or illegal string was specified" code: "12"
nsresult: "0x8053000c (NS_ERROR_DOM_SYNTAX_ERR)" location:
"http://coastal.dgs.udel.edu/sites/timeplot/webapp/api/scripts/plot.js
Line: 286"] code=12 INDEX_SIZE_ERR=1 DOMSTRING_SIZE_ERR=2
uncaught exception: An invalid or illegal string was specified
(NS_ERROR_DOM_SYNTAX_ERR)
ctx.lineTo(x,y);
Could have something to do with number of data vs date points but I'm
not sure. Has anyone tried this? Any suggestions on what to watch out
for or functions to edit? Thanks.
- John
**************************************************
John Callahan
Geospatial Application Developer
Delaware Geological Survey, University of Delaware
227 Academy St, Newark DE 19716-7501
Tel: (302) 831-3584
Email: [email protected]
http://www.dgs.udel.edu
**************************************************
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