easy sas

The question is from a colleague: there are 50 states and it requires to assign code to each state from a data set. In the original code the...

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Just some tips: options(error=recover) :  it will tell R to launch debug section and you can choose which one to debug options(show.e...

## first explain what is type="terms": If type="terms" is selected, a matrix of predictions ## on the additive s...

library ( ROCR ) library ( Hmisc )   ## calculate AUC from the package ROCR and compare with it from Hmisc   # method 1: from ROCR data ...

It's not easy to install hadoop and related items like hdfs hive and so on of your own, and it is more difficult to config them after i...

This is to show: in proc sql group by statement, select should only contain group by vars and summary vars (vars to be summarized) . Ot...

myiris=iris names(myiris)=c("sl", "sw", "pl", "pw", "name") with(myiris, cut(pl, breaks=...

original post link:   https://communities.sas.com/thread/44285?start=0&tstart=0   CLASS and BY statements have similar effects but t...

Suppose  U1~uniform(0,1), U2~uniform(0,1) , and U1 is independent of U2, then what is the distribution of  U1-U2 ? The solution is in ...

Those 3 ways can read SAS data into R. I prefer the first method since it gives the most choice to control. ### To read SAS data into ...

Sometimes it is necessary to read in a piece of data for ad-hoc analysis. We can save the data to txt and then read in by read.table. In th...

Here are some tips to increase the data reading speed in R: #The purpose is to compare the processing time when using different option...

Sometimes, we will get irregular coefficient: consider sell_amount vs sell_price , we should expect a negative coefficient because as the p...

The input is 99 records, the requirement is to split it into 10 groups as evenly as possible(10 records each for first 9 groups, and 9 rec...