How to change colour of data points depending on value of the data (i.e data range)

How do you change the color of data points (using a colormap) depending on value of a third variable. Patches??

Longitude = Pos(: , 1);
Latitude = Pos(: , 2);
plot(Longitude, Latitude);
hold
Data = Pos(: , 3);

Answer 1

[Walter Roberson]

pointsize = 12;
scatter(Longitude, Latitude, pointsize, Data)

[Rhys Leeming]

Can you specify a range of values for the 3rd variable?

[Walter Roberson]

A range of values for the pointsize ? No.