MATLAB: Set plot colour when assigned to a variable

categorycolorMATLABplotvariable

I am creating a plot showing how air pollution changes in a room over time. I have a record of activity in the room and want to colour the plot according to wether there is activity (1) or no activity (0), for which I have created a logistical variable.

I have used the below code but it is plotting no activity in yellow – which is very hard to see. How do I determine my own colours when plotting colour according to a variable?

scatter(Table.Date_Time, Table.PM_Concentration, 5, Table.Activity)

Best Answer

try to change color axis

caxis([min(Table.Activity) max(Table.Activity)])
colormap jet

Related Solutions

MATLAB: Change colour of plot when colouring according to a variable

Hi,

I understand that you are plotting air quality data using scatter function. You wanted to change the color of the plot based on the value in the variable ‘activity’. You could use the ‘MarkerFaceColor’ and ‘MarkerEdgeColor’ name-value pairs in the scatter function to change the color of your plot.

You could use a if statement to differentiate the activity variable. A sample MATLAB code could be

if activity == 0 
    scatter(Table.Date_Time, Table.Concentration, 5, Table.Activity, 'MarkerFaceColor', 'red'); 
else 
    scatter(Table.Date_Time, Table.Concentration, 5, Table.Activity, 'MarkerFaceColor', 'blue'); 
end

For further reference on coloring of a scatter plot refer : https://www.mathworks.com/help/matlab/ref/scatter.html

MATLAB: Is it possible to visualize all data in a multiple scatterplot

Maybe use scatter3() and visualize by using a z-offset. Not sure if it helps in your case

h1 = scatter3(table{:,variable},table{:,'PET'}, 0*ones(size(table{:,'PET'})), '+','MarkerEdgeColor',[102/255, 178/255, 255/255]);
hold on
h2 = scatter3(table{:,variable},table{:,'SET_'}, 1*ones(size(table{:,'SET_'})), '+','MarkerEdgeColor',[102/255, 255/255, 102/255]);
h3 = scatter3(table{:,variable},table{:,'UTCI'}, 2*ones(size(table{:,'UTCI'})), '+','MarkerEdgeColor',[255/255, 204/255, 153/255]);
h4 = scatter3(table{:,variable},table{:,'PT'}, 3*ones(size(table{:,'PT'})), '+','MarkerEdgeColor',[255/255, 102/255, 102/255]);
h5 = scatter3(table{:,variable},table{:,'mPET'}, 4*ones(size(table{:,'mPET'})), '+','MarkerEdgeColor',[204/255, 153/255, 255/255]);

Best Answer

Related Solutions

MATLAB: Change colour of plot when colouring according to a variable

MATLAB: Is it possible to visualize all data in a multiple scatterplot

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