creation of parameter map coastline

Hello,

I would like to know how to put in the coastline map the main parameter (aragonite saturation), obtaining just the points where it is.

e.g. figure I have created:

I need to know just which stations (dots) have my parameter (aragonite saturation), while these whose are all the parameters. Precisely I've used:

load coastlines

figure; hold on

xlim([-45,5])

ylim([25,50])

plot(coastlon,coastlat)

plot(long1-360,lat1,'.r');

plot(long2-360,lat2,'.b');

plot(long3-360,lat3,'.g');

Is possible to put inside these steps the variable I need?

Thank you

Sofia Stella

[darova]

The question is unclear

Can you show what points you want to find?

Answer 1

[Sofia Stella]

iN THE SAME map, how could I create a GRID on?

[Sofia Stella]

Sure.

These coloured points shows me ALL the chemical parameters of my stations (the dots).

But I want see just the stations of one particular parameter (Aragonite saturation), and see in how many stations are.

I mean, not all the stations have this parameter and i need to filter them.

I hope is more clean the answer.

Regards