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I have two variables, both numerical. I would like to find the unique values of the pairs, in other words, unique coordinates if I were to plot them. I also need to know how many pairs there are, but I guess I can use length() if I can somehow isolate the unique pairs first? Thanks a lot! Bonnie Yuan

I'm plotting x and y and there are a couple of outliers. I want to show the value of z for these couple of outliers. Is there an easy way to do this?

Hello, I'm trying to separate my dataset into 4 parts with the 4th one as the test dataset, and the other three to fit a model. I've been searching for the difference between these 2 functions in Caret package, but the most I can get is this-- A series of test/training partitions are created using createDataPartition while createResample creates one or more bootstrap samples.

Hi, I just started playing with county FIPS feature in maps package which allows geospatial visualization of variables on US county level. Pretty cool. I did some search but couldn't find answer to this question--how can I map more than 2 variables on US map? For example, you can map by the breakdown of income or family size. How do you further breakdown based on the values of both

I'm doing a text mining project where I have to manually enter a double quote as an element inside a vector. I tried char[10]='"'#where i enclosed the double quote in a pair of single quotes. But the result is [1] "\"". Somehow a back slash is added automatically. I also tried to enclose the double quote in a pair of double quotes. That didn't work either.

This is has been bugging me for a long time. Nobody around me seems to have this problem. I hope someone on the forum could help me. When I generate a R graph and want to bring the image into Word. I cannot copy and paste it like many of my classmates can do. The "Select" in Edit menu have all options grayed out. So what I ended up doing is to save it as pdf file and bring it

Hi, I used read.csv(file name, header=T, sep=",") to bring in a csv file I saved in MS Excel. The strange thing is all the data ended up in one big column. The number of rows match with the number of observations, but all the variables got squeezed into one column. Also the first row where the header is, the variables names have a dot between them, replacing the comma that's in the