Contourf NaNs plotted as zeros

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curoi
curoi 2014-6-7
评论： curoi 2014-6-10
I couldn't find anything concerning this issue already on the forums but here is the problem I am having. The code is attempting to plot water level array as a function of x, y, and time. However, only some of the xy matrices are plotting the NaN values as white while the others are plotting the NaN values as the color of zero on the color bar. It seems odd that this is arbitrary but I'm also plotting multiple contourf arrays on the same figure so this may have something to do with it. Here is the code:
for j = 43:43%length( m.Rkm_25.wpksk );
Fig1 = figure( 'Color', 'w', 'PaperPositionMode', 'auto', ...
'Units', 'inches', 'Position', [ 0.01 0.01 9.49 6.24 ] );
set( gca, 'XLim', [ 200000 300000 ], 'XTick', (200000:20000:300000), ...
'XTickLabel', ( 200:20:300 ), ...
'YLim', [ 80000 140000 ], 'YTick', (80000:20000:140000), ...
'YTickLabel', ( 80:20:140 ) );
for i = 1:length( domain );
hval = m.Rkm_25.wpksk( j, 1 ); %index for history file
val = m.Rkm_25.wpksk( j, 3 ); %index for map file
Awl = s.(domain{ i }).wlvl( :, :, val );
s.(domain{ i }).rpu = s.(domain{ i }).kfu( :, :, val ); % A domain points to removed
s.(domain{ i }).rpv = s.(domain{ i }).kfv( :, :, val );
Awl( s.(domain{ i }).rpu == 0 ) = NaN; %nan pts in A domain with no water
Awl( s.(domain{ i }).rpv == 0 ) = NaN;
contourf( s.(domain{ i }).xcordi, s.(domain{ i }).ycordi, Awl );
hold on;
end
set( gca, 'XLim', [ 200000 300000 ], 'XTick', ( 200000:20000:300000 ), ...
'XTickLabel', (200:20:300), ...
'YLim', [ 80000 140000 ], 'YTick', ( 80000:20000:140000 ), ...
'YTickLabel', ( 50:30:140 ) );
caxis( [ -2 2 ] );
colorbar
xlabel( 'X - WA South (km)', 'fontname', 'century', 'fontsize', 16 );
ylabel( 'Y - WA South (km)', 'fontname', 'century', 'fontsize', 16 );
str = [ 'Water Level @ ', phase_nam{ 1, m.Rkm_25.wpksk( j, 2 )}, ...
' Tide ref RKM 25 low Flow', ...
datestr( s.time.mapts( val, 1 ),'mmm-dd-yyyy HH:MM' ) ];
title( str, 'fontname', 'Century', 'fontsize', 18 );
set( gca, 'fontname', 'century', 'fontsize', 12 );
axes( 'parent', Fig1, 'position', [0.57 0.70 0.25 0.20] );
% plot( m.(mstruc_nm{ 11 }).dts2( indx.st:indx.en, 1 ), ...
% m.(mstruc_nm{ 11 }).dhgt2( indx.st:indx.en, 1 ), ...
% 'b-', 'linewidth', 1.5 );
%
% dateformat = 6;
% datetick( 'x', dateformat );
% set( gca, 'XLim', [ starttime endtime ], ...
% 'XTick', ( starttime:5:endtime ),'YLim',[ -2 2 ] );
%
% hold on ;
% text( m.(mstruc_nm{ 11 }).dts2( hval+m.(mstruc_nm{ 11 }).indpkt-1, 1 ), ...
% m.(mstruc_nm{ 11 }).dhgt2( hval, 1 ), 'X', 'fontname', 'century', 'fontweight','bold');
end
  5 个评论
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José-Luis
José-Luis 2014-6-10
How about changing NaN's to black or some other color?
curoi
curoi 2014-6-10
How would I do that? I thought NaN's were supposed to automatically be white.

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