# SandraConstantin/Day-2 forked from TraMineR-Training/Day-2

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Load the biofam data set that comes with the TraMineR library library (TraMineR) data(biofam)

Print the variable names names(biofam)

Create an age variable by subtracting the birth year from the year of the survey and add it to the biofam data frame biofam\$age <- 2002-biofam\$birthyr

What is the minimum, maximum, median and mean age in the sample? summary(biofam\$age) Min. 1st Qu. Median Mean 3rd Qu. Max. 45.00 51.00 58.00 59.47 67.00 93.00

What is the minimum, maximum, median and mean age of the women? I don't now how to filter on women only, I searched on Internet but failed to find an answer. Could you please show us how to do that?

Add a cohort factor to the biofam data frame grouping the birth years into the following categories: 1900-1929, 1930-1939, 1940-1949, 1950-1959. biofam\$cohortfactor <- cut(biofam\$birthyr, c(1900,1930,1940,1950,1959),labels=c("1900-1929", "1930-1939", "1940-1949", "1950-1959")) table(biofam\$cohortfactor)

Generate an histogram of the distribution of birthyear using the above birth year classes. (Look at the help of the hist function for how to do that.) hist(biofam\$cohortfactor,freq=TRUE) Does not work, I do not know how to do it.

Produce a frequency table of the cohort factor. table(biofam\$cohortfactor)

I do not know how to do questions 9,10 and 11. Could you please give an answer during the cclass?

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