Dear list, I have following data set, which I want to plot the "Scale" variable on the x-axis and "Mean"´on the y-axis for each Ageclass and for each sex. The Mean value of each Ageclass for each sex would be connected by a line. Totally, there should be 6 lines, from which three present the Mean values of each Ageclass for respective sex. Are there any easy ways to do this in R? Ageclass Scale Mean Sex 1 21-40 BP 40.26667 female 2 41-60 BP 34.10714 female 3 61-79 BP 37.30000 female 4 21-40 GH 30.25000 female 5 41-60 GH 39.00926 female 6 61-79 GH 49.30000 female 7 21-40 MH 56.53333 female 8 41-60 MH 62.42857 female 9 61-79 MH 72.72727 female 10 21-40 PF 25.86111 female 11 41-60 PF 42.42063 female 12 61-79 PF 52.17172 female 13 21-40 RE 38.09524 female 14 41-60 RE 42.85714 female 15 61-79 RE 42.42424 female 16 21-40 RP 20.00000 female 17 41-60 RP 25.89286 female 18 61-79 RP 15.90909 female 19 21-40 SF 51.66667 female 20 41-60 SF 63.88889 female 21 61-79 SF 57.95455 female 22 21-40 VT 32.11111 female 23 41-60 VT 36.96429 female 24 61-79 VT 33.18182 female 25 21-40 BP 35.00000 male 26 41-60 BP 37.75000 male 27 61-79 BP 36.00000 male 28 21-40 GH 42.16667 male 29 41-60 GH 41.89062 male 30 61-79 GH 41.40000 male 31 21-40 MH 72.00000 male 32 41-60 MH 66.60417 male 33 61-79 MH 75.20000 male 34 21-40 PF 41.85185 male 35 41-60 PF 55.31250 male 36 61-79 PF 47.00000 male 37 21-40 RE 37.03704 male 38 41-60 RE 54.16667 male 39 61-79 RE 46.66667 male 40 21-40 RP 27.77778 male 41 41-60 RP 28.12500 male 42 61-79 RP 20.00000 male 43 21-40 SF 61.11111 male 44 41-60 SF 66.40625 male 45 61-79 SF 60.00000 male 46 21-40 VT 38.88889 male 47 41-60 VT 30.93750 male 48 61-79 VT 42.00000 male Thanks for any help, Tom
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