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Off list the following question was asked regarding EpiData Analysis

Hi There, I have a question that i am trying to evaluate with a multi response

answer.

I have set out the question as follow with a text variable for each

answer:

Q1: What fruit do you like _ _ _ _ _ a - Apples b - Orange c - Banana d - Pear e - Grapes Now when i go to analyse this, is there a way i can graph the response for this answer on a bar graph? I cannot seem to be able to add multiple series into the graph to compare all answers for this question?

Currently bar graphs can only take one variable at a time. Except for box and scatter/line plots for several variables. Box plots for several variables has just been introduced with the pre v2.1 - v2.0.5.148 version. For all graphs a /by variable has been introduced, but this does not change the basic limitation of one variable per plot.

What you could do to analyse the data is to use stattables and count binary indicators calculated like this: gen i apple = (pos(q1, "a" ) > 0) gen i orange = (pos(q1, "b" ) > 0) etc for the other fruits.

stattable apple orange ......../stat="sum" /N /close * then in the new file with counts of the fruits and the total some percentages could be worked out.

A graph showing the combinations of the variables in the form of a VENN diagram could be a solution, but currently this cannot be done with EpiData Analysis. I wrote a command for Stata for this: See: http://www.stata.com/products/stb/journals/stb47.pdf . The initial version has been extended with four factor ellipses. We could consider including Venn diagrams in a later version (but at the earliest second quarter 2009) and also a multiple response tables command.

regards Jens Lauritsen EpiData Association