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Merging panel data in R

### A function for descriptive statistics with R

I wrote this function to prepare summary statistics of regression models. In such a table I typically include mean, standard deviation, minimum, and maximum. The function can be directly apply to outputs of general regressions models such as lm() or glm(). Then I may save the results in a csv file, and run Excel2LaTeX to get LaTeX codes.

#. The function is:
------------------------------------------------------------
msummary <- function(M){
n <- dim(M\$model)[2]
s <- matrix(NA,dim(M\$model)[2],5)
for (i in 1:n) {
s[i,] <- cbind(mean(as.numeric(M\$model[,i])),
sd(as.numeric(M\$model[,i])),
min(as.numeric(M\$model[,i])),
median(as.numeric(M\$model[,i])),
max(as.numeric(M\$model[,i])))
}
S <- data.frame(s)
colnames(S) <- cbind("Mean","St.D.","Min","Median","Max")
S\$N <- rep(dim(M\$model)[1],dim(M\$model)[2])
rownames(S) <- names(M\$model)
S
}
------------------------------------------------------------
#. An example:
------------------------------------------------------------
> M1.c\$call
glm(formula = OUT ~ -1 + SERVICE + MSA + POPLG + POPLG2 + EDULEVEL +
POVERTY + CHIEF + PTCLG + STCLG + PTC2 + STC2 + UNPAVED +
PARTY + TURNOUT, family = binomial(link = "logit"), data = data)
> msummary(M1.c)
Mean  St.D.    Min  Median    Max     N
OUT        0.269  0.444  0.000   0.000   1.00 10661
SERVICE    8.979  5.141  1.000   9.000  19.00 10661
MSA        0.296  0.456  0.000   0.000   1.00 10661
POPLG     10.265  1.132  7.510  10.071  13.73 10661

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