How to plot multiple scatter plot with regression line in one plot

I am trying to show multiple scatter plots with regression line in one plot with the hold on function. But I get the error message

"Assigning to 2 elements using a simple assignment statement is not supported. Consider using comma-separated list

assignment." What do I do wrong?

scatter(all_subs_data(:,4),all_subs_data(:,144),"filled","o","MarkerFaceColor","r","SizeData",100, 'MarkerFaceAlpha',.1)

h1 = lsline

h1.Color = 'r'

h1.LineWidth = 3.0000

hold on

scatter(all_subs_data(:,5),all_subs_data(:,143),"filled","o","MarkerFaceColor","b","SizeData",100, 'MarkerFaceAlpha',.1)

h2 = lsline

h2.Color = 'b'

h2.LineWidth = 3.0000

hold off

Answer 1

[Voss]

Note that "lsline superimposes a least-squares line on each scatter plot in the current axes".

That is, the second call to lsline returns two lines, since there are two scatter plots in the axes at that point in time.

To avoid creating redundant lines, make both scatter plots first, call lsline, and then set the properties of each line object returned:

all_subs_data = rand(10,150); % random data

scatter(all_subs_data(:,4),all_subs_data(:,144),"filled","o","MarkerFaceColor","r","SizeData",100,  'MarkerFaceAlpha',.1)
hold on 
scatter(all_subs_data(:,5),all_subs_data(:,143),"filled","o","MarkerFaceColor","b","SizeData",100,  'MarkerFaceAlpha',.1)

h = lsline();
h(1).Color = 'r';
h(1).LineWidth = 3.0000;
h(2).Color = 'b';
h(2).LineWidth = 3.0000;
hold off

[Oliver Steiner]

Thanks it worked!