Change colour of plot when colouring according to a variable

Question

William Garrett 2020-3-16

0
链接

此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/511106-change-colour-of-plot-when-colouring-according-to-a-variable

编辑： Aghamarsh Varanasi 2020-3-18

I have some air quality data from a room and an activity log which tells me if anybody was in it.

I have created a plot showing the change in pollution concentration over time and I have coloured the plot according to activity (1 = activity; 0 = no activity).

However, when there is no activity, the plot is yellow - which is hard to see. How do I change this? I have used the following code:

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

0 个评论
显示 -2更早的评论隐藏 -2更早的评论

请先登录，再进行评论。

请先登录，再回答此问题。

Answer 1

Aghamarsh Varanasi 2020-3-18

0
链接

此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/511106-change-colour-of-plot-when-colouring-according-to-a-variable#answer_420726

编辑：Aghamarsh Varanasi 2020-3-18

在 MATLAB Online 中打开

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 