Plot different markers on the same graph based on “if-else” statement (third parameter) in AppDesigner

Hi,

I have a table of data that I read from Excel using readtable in AppDesigner. The data consists of Lat,Long and Type.

Based on "Type", I would like to plot the Lat (Y) and Long (X) using 2 different markers.

i.e. if Type="A", plot the X & Y coordinates using "+" type marker.

if Type = "B", plot the X & Y coordinates using "square" type marker.

I have try using this kind of coding

.....

.....

.....

t = readtable(Grid.xlsx,opts);

app.UITable.Data = t;

x = app.UITable.Data.Long;

y = app.UITable.Data.Lat;

hold(app.UIAxes,'on')

if strcmp (app.UITable.Data.Type, 'A')

scatter(app.UIAxes,x,y,'+','black');

else

scatter(app.UIAxes,x,y,'square','blue');

end

However, MATLAB plots all the X & Y coordinates using the "+" type marker.

Please advise and thanks in advance

Answer 1

[Cameron]

You should use indexing instead.

t = readtable(Grid.xlsx,opts);
app.UITable.Data = t;
x = app.UITable.Data.Long;
y = app.UITable.Data.Lat;
groupA = string(app.UITable.Data.Type) == "A";
groupB = string(app.UITable.Data.Type) == "B";
hold(app.UIAxes,'on')
scatter(app.UIAxes,x(groupA),y(groupA),'+','black');
scatter(app.UIAxes,x(groupB),y(groupB),'s','blue');
hold(app.UIAxes,'off')

[FEH]

It works!! thank you so much!