Question about which kind of plot to use
Max wrote:
Hi Everyone, I've got a question about data representation. I have some psychometric data with 5 scores for 15 different groups. I've been asked to show some kind of mean plots. The data below is the mean and SD for a given group, unfortunately my employer doesn't want me posting full datasets. :( The groups V,W,X,Y,Z are divided into Bottom, (B), Middle (M) and Top (T). An example of my data is shown below. Score 1 Mean SD B M T B M T V 86.9 13.0 88.8 16.9 2.0 10.5 W 16.1 96.1 17.7 2.2 4.6 1.7 X 50.7 61.1 74.7 4.7 3.7 7.6 Y 68.5 99.7 37.6 6.0 8.0 2.3 Z 92.7 22.3 69.4 6.5 1.2 2.2 What I did before was a standard mean plot: plotMeans(w$score1, w$Factor, error.bars="sd",xlab="Factor",ylab="Score",main="Group W Score 1 Plot") However, with 15 groups and 5 scores this turns into 75 individual graphs. Is there a way to layer mean plots? Or show several mean plots in the Same graph? Any ideas or suggestions would be great.
Hi Max, This may get a bit crowded, but brkdn.plot (plotrix) will do something like this. I think you would want your group variable as the "groups" argument (!) and the variable that specifies Bottom/Middle/Top as the "obs" argument. Pass "sd" as the "md" argument to get standard deviation bars. Jim