plot each cast for each year using findgroups and splitapply

Question

akk 2020-10-16

0
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https://ww2.mathworks.cn/matlabcentral/answers/616603-plot-each-cast-for-each-year-using-findgroups-and-splitapply

评论： Ameer Hamza 2020-10-20

Hello,

I have a dataset with temperature, depth, castID and year. For each year, there are multiple casts, and the castID is associated with multiple temperature and depth readings. I would like to group the data by year, then plot each individual cast in that year using a specific color so that each cast associated with e.g., yr 2010 is green.

group_yr=findgroups(CASTYEAR);

figure;hold on;

Y=splitapply(@plot,TEMP_DEGC,DEPTH_M,group);

The issue is that matlab assumes all the casts in 2010 is a continuous dataset and so the plot lines are continuous as well, rather than seperate for each castID. I think I should also apply: group_ID=findgroups(CASTID);

But Im not sure how to plot according to group_ID and group_yr, and when I use:

Y=splitapply(@plot,TEMP_DEGC,DEPTH_M,group_ID(group_yr==1);

it does not work.