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How can I count the numbers of NaNs in some determined coordinates when you use the comand 'coastlines'?

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Pablo Avendaño Mauriz
回答： Chidvi Modala 2020-12-30
This program gives me the numer of NaNs in all the world but not in one particular country.
worldmap('Spain')
load coastlines
sum(sum(isnan(coastlat)))

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Chidvi Modala
Chidvi Modala 2020-12-30
You may use shaperead function to get latitudes and longitudes of a particular country. You can refer to the following example to count the numbers of NaNs in a particular country coordinates
Val = shaperead('landareas', 'UseGeoCoords', true,...
'Selector',{@(name) strcmp(name,'Africa and Eurasia'), 'Name'});
sum(isnan(Val.Lat));

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