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Hello! I am trying to create a 3d graph of these that have to be displayed and we got this error when I try to save and execute the matlab code ... I attach the error, the complete matlab code and the web from where the information was taken. Website of the information: https://es.mathworks.com/matlabcentral/mlc-downloads/downloads/submissions/56910/versions/4/previews/html/ThingSpeakWeatherStation.html#2 Graph I want to create: Matlab code: % Channel ID to read data from readChannelID = 803557; % Specify date range dateRange = [datetime('March 7, 2016'),datetime('March 13, 2016')]; % Read data including the timestamp, and channel information. [data,time,channelInfo] = thingSpeakRead(readChannelID,'Fields',1:7,... 'DateRange',dateRange); % Create variables to store different sorts of data temperatureData = data(:,1); humidityData = data(:,2); pressureData = data(:,3); rainData = data(:,4); windSpeedData = data(:,5); windGustData = data(:,6); windDirectionData = data(:,7); % Create a day range vector dayRange = day(dateRange(1):dateRange(2)); % Pre-allocate matrix weatherData = zeros(length(dayRange),24); % Generate temperature 3D bar chart % Get temperature per whole clock for each day for m = 1:length(dayRange) % Loop over all days for n = 1:24 % Loop over 24 hours if any(day(time)==dayRange(m) & hour(time)==n); % Check if data exist for this specific time hourlyData = temperatureData((day(time)==dayRange(m) & hour(time)==n)); % Pull out the hourly temperature from the matrix weatherData(m,n) = hourlyData(1); % Assign the temperature at the time closest to the whole clock end end end % Plot figure h = bar3(datenum(dateRange(1):dateRange(2)), weatherData); for k = 1:length(h) % Change the face color for each bar h(k).CData = h(k).ZData; h(k).FaceColor = 'interp'; end title('Temperature Distribution') xlabel('Hour of Day') ylabel('Date') datetick('y','mmm dd') % Change the Y-Tick to display specified date format ax = gca; ax.XTick = 1:24; % Change the X-Tick to 24 hours ax.YTickLabelRotation = 30; % Rotate label for better display colorbar % Add a color bar to indicate the scaling of color % Generate humidity 3D bar chart % Get humidity per whole clock for each day for m = 1:length(dayRange) % Loop over all days for n = 1:24 % Loop over 24 hours if any(day(time)==dayRange(m) & hour(time)==n); % Check if data exist for this specific time hourlyData = humidityData((day(time)==dayRange(m) & hour(time)==n)); % Pull out the hourly humidity from the matrix weatherData(m,n) = hourlyData(1); % Assign the humidity at the time closest to the whole clock end end end % Plot figure h = bar3(datenum(dateRange(1):dateRange(2)), weatherData); for k = 1:length(h) % Change the face color for each bar h(k).CData = h(k).ZData; h(k).FaceColor = 'interp'; end title('Humidity Distribution') xlabel('Hour of Day') ylabel('Date') datetick('y','mmm dd') % Change the Y-Tick to display specified date format ax = gca; ax.XTick = 1:24; % Change the X-Tick to 24 hours ax.YTickLabelRotation = 30; % Rotate label for better display colorbar % Add a color bar to indicate the scaling of color Error we said: I would really appreciate your help. Thanks. Marc

I read this page: https://www.mathworks.com/help/thingspeak/plot-a-histogram-with-a-distribution-fit.html I generated a histogram with a gaussian fit using histfit but I also need the correlation coefficient for the fit to the data. How do I obtain it? current code: load('datafile.dat'); ydata=datafile; histfit(ydadta,100);