help Surface Temperature Contour Plot

Hi all, could anyone help me with this code .it shows the following errors

Also, when a plot my Results Gives results on the contrary

For example, the data of the end of the Gulf shows high temperatures compared to the end of the open my plot shows the opposite where the blue color shows lower temperatures while must higher .

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Warning: Failed to open file C:\Users\DELLpower\Desktop\march\SAU_adm0.shx or file

C:\Users\DELLpower\Desktop\march\SAU_adm0.SHX. Will build index from SHP file.

> In mapformats\private\openShapeFiles>openSHX at 107

In mapformats\private\openShapeFiles at 26

In shaperead at 206

In readMapData>readFromShapeFile at 134

In readMapData at 32

In map\private\importFromFileAndSetDataArgs at 27

In geoshow at 262

Warning: Failed to open file C:\Users\DELLpower\Desktop\march\SAU_adm0.shx or file

C:\Users\DELLpower\Desktop\march\SAU_adm0.SHX. Depending on DBF file to get number of records.

> In mapformats\private\openShapeFiles>openSHX at 109

In mapformats\private\openShapeFiles at 26

In shapeinfo at 72

In readMapData>readFromShapeFile at 136

In readMapData at 32

In map\private\importFromFileAndSetDataArgs at 27

In geoshow at 262

>>

Warning: string is obsolete and will be discontinued.

Use char instead.

Warning: Failed to open file C:\Users\DELLpower\Desktop\march\SAU_adm0.shx or file

C:\Users\DELLpower\Desktop\march\SAU_adm0.SHX. Will build index from SHP file.

> In mapformats\private\openShapeFiles>openSHX at 107

In mapformats\private\openShapeFiles at 26

In shaperead at 206

Warning: Failed to open file C:\Users\DELLpower\Desktop\march\SAU_adm0.dbf or file

C:\Users\DELLpower\Desktop\march\SAU_adm0.DBF. Shape output structure will have no attribute fields.

> In mapformats\private\openShapeFiles>openDBF at 122

In mapformats\private\openShapeFiles at 27

In shaperead at 206

Error using round

Too many input arguments.

%==========================================================================
% Surface Temperature Contour Plot



% Read Excel Sheet Data
close all;clear;clc
[rawDataNum,rawDataStr] = xlsread('Summerand Spring.xlsx','Sheet1','A1:J27');

% Extract Required Data from Raw Data
longitudes =  rawDataNum(1,1:end);
latitudes = rawDataNum(2,1:end);

sstAll = rawDataNum(4:end,1:end);
sstAvg = mean(sstAll);
figure(1)
% Limit geograpical co-ordinates to required area 
worldmap([21.7 21.78],[39.07 39.15])

% Display land area limited to bay region
LandArea = geoshow('SAU_adm0.shp');

% Plot individual markers on the map data

% Initialize a Jet Colormap with 8 colors
jetColorMap = jet(length(sstAvg));

for i = 1:length(sstAvg)
      % Get the color for this subject from the jet colormap.
  markerColour = jetColorMap(i,:);
    hold on
    plotm(latitudes(i),longitudes(i),sstAvg(i),'Marker','o','MarkerSize',10,'MarkerFaceColor',markerColour)
    textm(latitudes(i) ,longitudes(i) + 0.001,num2str(sstAvg(i)),'Color','m')
end

% Display colorbar.
colormap(jetColorMap);
colorbar('YTickLabel',string(linspace(min(sstAvg),max(sstAvg),5)))
title('Geomap of Surface Temperature')

% Load landfile to an array
shp_res = shaperead('SAU_adm0.shp');
x1 = round(shp_res.BoundingBox(1,1))-1;
x2 = round(shp_res.BoundingBox(2,1))+1;
y1 = round(shp_res.BoundingBox(1,2))-1;
y2 = round(shp_res.BoundingBox(2,2))+1;

[lonS, latS]= meshgrid(x1:0.01:x2,y1:0.01:y2);
lon1(1,:) = lonS(1,:); lat1(1,:) = latS(:,1);
x4 = length(lon1); y4 = length(lat1);
Z = randn(y4,x4);

% create the mat file
R = makerefmat('RasterSize',size(Z'),'Lonlim',[39.07 39.15],'Latlim',[21.7 21.78]);
mat_data = vec2mtx(shp_res.Y,shp_res.X,Z',R,'filled');

mat_data = imrotate(flip(mat_data',2),180);
mat_data = mat_data'; %first generate the transpose
mat_data(end:-1:1)= mat_data; %then flip it
mat_data = mat_data - min(mat_data(:));
mat_data = mat_data / max(mat_data(:));

[lonS, latS]= meshgrid(linspace(39.07,39.15,size(mat_data,1)),linspace(21.7,21.78,size(mat_data,2)));
% % geoshow(latS',lonS',flip(mat_data,1));

% Interpolate data to create a mesh surface
vq = griddata(latitudes,longitudes,sstAvg,latS,lonS,'natural');
vq = imrotate(vq,-90);

cmin = nanmin(vq(:));
cmax = nanmax(vq(:));
vq(isnan(vq)) = 0;

% Dilation to create the gradient
se = strel('disk',300);
vq = imdilate(vq,se);
overlap_mat = ones(size(vq,1),size(vq,2));
overlap_mat(vq == 0) = 0;

landfilled = vq .* mat_data;

overlap_mat = ~(overlap_mat & mat_data) & mat_data;
% landfilled(overlap_mat == 1) = cmax + cmax * 0.001;
landfilled(overlap_mat == 1) = 500;
% landfilled(landfilled == 0) = cmin - cmin * 0.001;
landfilled(landfilled == 0) = 0;

% Display final Image 
figure;imagesc(landfilled);
jetColorMap2 = jet(200);
jetColorMap2(1,:) = [0.9 0.9 0.9];
% jetColorMap2(end,:) = [0.7 0.7 0.7];
colormap(jetColorMap2);
colorbar
caxis([cmin cmax]);
xlabel('Longitudes')
xticklabels(round(linspace(min(longitudes),max(longitudes),9),2))
ylabel('Latitudes')
yticklabels(round(linspace(min(latitudes),max(latitudes),5),2))
title('Geomap of Surface Temperature')

Answer 1

[Walter Roberson]

1. You need to have SAU_adm0.shx in your Desktop\March directory.
2. You are using a version of MATLAB older than R2016b, but this code was written for R2016b or later. To offer you the proper fix for the string() issue, we need to know which release you are using
3. The code was written for R2014b or later in the way it uses round(). We need to know what release you are using.

[b.m.n n]

that's right, I'm using the version R2014a

[Walter Roberson]

You will need to find SAU_adm0.shx yourself, possibly from https://data.world/ocha-romena/41ce9023-1d21-4549-a485-94316200aba0

For your code, change

colorbar('YTickLabel',string(linspace(min(sstAvg),max(sstAvg),5)))

to

colorbar('YTickLabel', linspace(min(sstAvg),max(sstAvg),5))

Change

xticklabels(round(linspace(min(longitudes),max(longitudes),9),2))
ylabel('Latitudes')
yticklabels(round(linspace(min(latitudes),max(latitudes),5),2))

to

xt = linspace(min(longitudes), max(longutides), 9);
xtc = cellstr( num2str(xt(:), '%.2f') );
yt = linspace(min(latitudes), max(latitudes), 5);
ytc = cellstr( num2str(yt(:), '%.2f') );
ylabel('Latitudes')
set(gca, 'XTickLabels', xtc, 'YTickLabels', ytc)

Answer 2

[b.m.n n]

Thanks for helping me, it was helpful

But still has to figure out why The first plot shows a difference in the values in the final plot

[b.m.n n]

Figure I show Temperatures from the smallest to high

The second Fig shows temp from the highest value to smallest

[Walter Roberson]

The first plot with the circle markers makes no attempt to color by temperature. It creates a jet colormap and then colors in index order. We have no reason to expect that sstAvg will happen to be sorted in increasing order.