Displaying 3 results from an estimated 3 matches for "vlasimsky".
2011 Jan 12
3
Problems creating a PNG file for a dendrogram: "Error in plot.window(...) : need finite 'xlim' values"
...ssing arguments to max; returning -Inf
#3: In min(x) : no non-missing arguments to min; returning Inf
#4: In max(x) : no non-missing arguments to max; returning -Inf
This is the exact same code, only a prior call to png() causes the seemingly unrelated xlim to fail. Why is this?
Thanks,
Richard Vlasimsky
2010 Nov 08
2
A more efficient way to roll values in an irregular time series dataset?
Does anyone recommend a more efficient way to "roll" values in a time series dataset?
I merged a bunch of different time series datasets (10's of thousands of them) whose observation dates and sampling interval differ. Some time series observations are reported at the beginning of the month, some at the end, some on Mondays, some on Wednesday, some annually, etc.
In the
2010 Nov 24
5
Performance tuning tips when working with wide datasets
Does anyone have any performance tuning tips when working with datasets that are extremely wide (e.g. 20,000 columns)?
In particular, I am trying to perform a merge like below:
merged_data <- merge(data1, data2, by.x="date",by.y="date",all=TRUE,sort=TRUE);
This statement takes about 8 hours to execute on a pretty fast machine. The dataset data1 contains daily data going