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%% Replaces one hours worth of data with NaN | ||
clear all | ||
close all | ||
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OriginalFileName = '/Users/juhildungrani/Desktop/Sem 4/Big Data/work/5011CEM2021-dungranij/2a Data Exploration'; | ||
NewFileName = './Model/TestFileNaN.nc'; | ||
copyfile(OriginalFileName, NewFileName); | ||
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C = ncinfo(NewFileName); | ||
ModelNames = {C.Variables(1:6).Name}; | ||
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%% Change data to NaN | ||
BadData = NaN(700,400,1); | ||
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%% Write to *.nc file | ||
Hour2Replace = 12; | ||
for idx = 1:8 | ||
ncwrite(NewFileName, ModelNames{idx}, BadData, [1, 1, Hour2Replace]); | ||
end |
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%% Script to examine NetCDF data formats and check for NaN | ||
% Note, you would carry out this test each time you load data. | ||
% You should NOT test the whole file at the start | ||
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clear all | ||
close all | ||
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%% Test a good file | ||
NaNErrors = 0; | ||
%% Set file to test | ||
FileName = '/Users/juhildungrani/Desktop/Sem 4/Big Data/work/5011CEM2021-dungranij/2a Data Exploration/Model 2/TestFileNaN.nc'; % define our test file | ||
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Contents = ncinfo(FileName); % Store the file content information in a variable. | ||
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StartLat = 1; | ||
StartLon = 1; | ||
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for idxHour = 1:25 | ||
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for idxModel = 1:8 | ||
Data(idxModel,:,:) = ncread(FileName, Contents.Variables(idxModel).Name,... | ||
[StartLat, StartLon, idxHour], [inf, inf, 1]); | ||
end | ||
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% check for NaNs | ||
if any(isnan(Data), 'All') | ||
fprintf('NaNs present\n') | ||
NaNErrors = 1; | ||
end | ||
end | ||
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fprintf('Testing files: %s\n', FileName) | ||
if NaNErrors | ||
fprintf('NaN errors present!\n') | ||
else | ||
fprintf('No errors!\n') | ||
end | ||
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%% Test File with Errors | ||
NaNErrors = 0; | ||
%% Set file to test | ||
FileName = '../Model/TestFileNaN.nc'; % define our test file | ||
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Contents = ncinfo(FileName); % Store the file content information in a variable. | ||
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StartLat = 1; | ||
StartLon = 1; | ||
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fprintf('Testing files: %s\n', FileName) | ||
for idxHour = 1:25 | ||
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for idxModel = 1:8 | ||
Data(idxModel,:,:) = ncread(FileName, Contents.Variables(idxModel).Name,... | ||
[StartLat, StartLon, idxHour], [inf, inf, 1]); | ||
end | ||
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% check for NaNs | ||
if any(isnan(Data), 'All') | ||
fprintf('NaNs present during hour %i\n', idxHour) | ||
NaNErrors = 1; | ||
end | ||
end | ||
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if NaNErrors | ||
fprintf('NaN errors present!\n') | ||
else | ||
fprintf('No errors!\n') | ||
end |
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@@ -0,0 +1,57 @@ | ||
%% Script to examine NetCDF data formats and check for NaN | ||
% Note, you would carry out this test each time you load data. | ||
% You should NOT test the whole file at the start | ||
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clear all | ||
close all | ||
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%% Test File with Errors | ||
NaNErrors = 0; | ||
%% Set file to test | ||
DataFileName = '../Model/TestFileNaN.nc'; % define our test file | ||
% FileName = '../Model/o3_surface_20180701000000.nc'; % un rem this line to see what happens with good data | ||
Contents = ncinfo(DataFileName); % Store the file content information in a variable. | ||
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%% Create and open log file | ||
LogFileName = 'AnalysisLog.txt'; | ||
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% create new log file, 'w' replaces the file if present. To continually | ||
% append, use 'a' | ||
LogID = fopen('AnalysisLog.txt', 'w'); | ||
fprintf(LogID, '%s: Starting analysis of %s\n', datestr(now, 0), DataFileName); | ||
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StartLat = 1; | ||
StartLon = 1; | ||
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fprintf('Testing files: %s\n', DataFileName) | ||
for idxHour = 1:25 | ||
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for idxModel = 1:8 | ||
Data(idxModel,:,:) = ncread(DataFileName, Contents.Variables(idxModel).Name,... | ||
[StartLat, StartLon, idxHour], [inf, inf, 1]); % 'inf' reads all the data | ||
end | ||
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% check for NaNs | ||
if any(isnan(Data), 'All') | ||
NaNErrors = 1; | ||
%% display warning | ||
fprintf('NaNs present\n') | ||
ErrorModel = find(isnan(Data), 1, 'first'); | ||
%% find first error: | ||
fprintf('Analysis for hour %i is invalid, NaN errors recorded in model %s\n',... | ||
idxHour, Contents.Variables(ErrorModel).Name) | ||
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% Write to log file | ||
fprintf(LogID, '%s: %s processing data hour %i\n', datestr(now, 0), 'NaN Error', idxHour); | ||
else | ||
% write to log file | ||
fprintf(LogID, '%s: %s processing data hour %i\n', datestr(now, 0), 'Success', idxHour); | ||
end | ||
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end | ||
fclose(LogID); | ||
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if ~NaNErrors | ||
fprintf('No errors!\n') | ||
end |