Mapping Toolbox

spzerom

Create a sparse matrix map of zeros

Syntax

• map = spzerom(latlim,lonlim,scale)
  [map,maplegend] = spzerom(latlim,lonlim,scale)
  

Description

map = spzerom(latlim,lonlim,scale) returns a sparse regular matrix map consisting entirely of zeros. The two-element vectors latlim and lonlim define the latitude and longitude limits of the geographic region. They should be of the form [south north] and [west east], respectively. The number of rows and columns per angle unit is set by the scalar scale.

[map,maplegend] = spzerom(latlim,lonlim,scale) returns the three-element map legend vector for the returned map.

Examples

• [map,maplegend] = spzerom([46,51],[-79,-75],1)
  map =
     All zero sparse: 5-by-4
  maplegend =
       1    51   -79
  

See Also

limitm	Matrix map limits
map legend vector	Data structure for describing regular matrix maps
nanm	Create a matrix map of NaNs
onem	Create a matrix map of ones
sizem	Rows and columns needed for map
zerom	Create a full matrix map of zeros

spcread

stdist