I Just Want To Read Text From URL And Save It As Txt.... But How?

Hello, Community

I just want to ask about how to read text data from URL and save it as ASCII / .Txt Data. It maybe a simple question for all of you, but it kinda so difficult for me...

So i have a data from URL like this :

2024 05 21 33744 33744.5 2602 4 1.667 1.000 1.000 2.667 2.667 2.333 1.667 1.667 6 4 4 12 12 9 6 6 7 165 190.8 195.4 0 2024 05 22 33745 33745.5 2602 5 1.667 0.667 0.333 0.333 0.000 0.667 1.333 1.333 6 3 2 2 0 3 5 5 3 152 195.7 200.6 0 2024 05 23 33746 33746.5 2602 6 0.667 1.667 1.667 2.333 2.333 1.667 2.333 4.000 3 6 6 9 9 6 9 27 9 134 176.2 180.7 0 2024 05 24 33747 33747.5 2602 7 2.000 3.000 2.667 3.000 2.000 1.333 0.333 1.333 7 15 12 15 7 5 2 5 8 126 162.8 167.0 0 2024 05 25 33748 33748.5 2602 8 1.667 1.333 1.333 0.667 0.667 1.667 1.333 2.333 6 5 5 3 3 6 5 9 5 104 152.4 156.4 0 2024 05 26 33749 33749.5 2602 9 1.333 2.333 1.000 2.000 2.667 2.667 2.667 1.000 5 9 4 7 12 12 12 4 8 120 155.6 159.7 0

Or like this in the image of the source:

The data result of webread function is just like this :

textweb = webread("https://kp.gfz-potsdam.de/kpdata?startdate=2024-05-21&enddate=2024-05-26&format=kp1#kpdatadownload-143");
textweb =
'2024 05 21 33744 33744.5 2602  4  1.667  1.000  1.000  2.667  2.667  2.333  1.667  1.667    6    4    4   12   12    9    6    6     7 165    190.8    195.4 0
     2024 05 22 33745 33745.5 2602  5  1.667  0.667  0.333  0.333  0.000  0.667  1.333  1.333    6    3    2    2    0    3    5    5     3 152    195.7    200.6 0
     2024 05 23 33746 33746.5 2602  6  0.667  1.667  1.667  2.333  2.333  1.667  2.333  4.000    3    6    6    9    9    6    9   27     9 134    176.2    180.7 0
     2024 05 24 33747 33747.5 2602  7  2.000  3.000  2.667  3.000  2.000  1.333  0.333  1.333    7   15   12   15    7    5    2    5     8 126    162.8    167.0 0
     2024 05 25 33748 33748.5 2602  8  1.667  1.333  1.333  0.667  0.667  1.667  1.333  2.333    6    5    5    3    3    6    5    9     5 104    152.4    156.4 0
     2024 05 26 33749 33749.5 2602  9  1.333  2.333  1.000  2.000  2.667  2.667  2.667  1.000    5    9    4    7   12   12   12    4     8 120    155.6    159.7 0
     '    

And i want to know how to convert the output of webread function above to become a data like this :

   "2024 05 21 33744 33744.5 2602  4  1.667  1.000  1.000  2.667  2.667  2.333  1.667  1.667    6    4    4   12   12    9    6    6     7 165    190.8    195.4 0"
    "2024 05 22 33745 33745.5 2602  5  1.667  0.667  0.333  0.333  0.000  0.667  1.333  1.333    6    3    2    2    0    3    5    5     3 152    195.7    200.6 0"
    "2024 05 23 33746 33746.5 2602  6  0.667  1.667  1.667  2.333  2.333  1.667  2.333  4.000    3    6    6    9    9    6    9   27     9 134    176.2    180.7 0"
    "2024 05 24 33747 33747.5 2602  7  2.000  3.000  2.667  3.000  2.000  1.333  0.333  1.333    7   15   12   15    7    5    2    5     8 126    162.8    167.0 0"
    "2024 05 25 33748 33748.5 2602  8  1.667  1.333  1.333  0.667  0.667  1.667  1.333  2.333    6    5    5    3    3    6    5    9     5 104    152.4    156.4 0"
    "2024 05 26 33749 33749.5 2602  9  1.333  2.333  1.000  2.000  2.667  2.667  2.667  1.000    5    9    4    7   12   12   12    4     8 120    155.6    159.7 0"
    

OR just simply save the output of webread function to become a txt file (ASCII) which can be opened in my local PC...

Thank you everyone for your attention and cooperation. I would be very grateful if community can help me to solve this problem /.\ /.\ /.\

Answer 1

[Mathieu NOE]

hello

try this

textweb = webread("https://kp.gfz-potsdam.de/kpdata?startdate=2024-05-21&enddate=2024-05-26&format=kp1#kpdatadownload-143");

% save char array to txt file : 
filename = 'myTextFile.txt';

% Open the file for writing using fopen:
fid = fopen(filename, 'w'); % Open the file for writing (overwrite if necessary)

% Write the char array to the file using fprintf. In this case, we interpret newline characters as new lines:
fprintf(fid, '%s', textweb);

% Close the file using fclose (this step is important!):
fclose(fid);

[Mathieu NOE]

FYI, if you have arrays of strings or char , as in the example below , this is another example how to save it to a txt file

% some char or string arrays

map_info = 'UTM, 0.500000, 0.500000, 699960.000000, 3300000.000000, 10.000000, 10.000000, north, planar, units=Meters';

projection_info = '"PROJCRS["WGS 84 / UTM zone 43N",BASEGEOGCRS["WGS 84",ENSEMBLE["World Geodetic System 1984 ensemble",MEMBER["World Geodetic System 1984 (Transit)"],MEMBER["World Geodetic System 1984 (G730)"],MEMBER["World Geodetic System 1984 (G873)"],MEMBER["World Geodetic System 1984 (G1150)"],MEMBER["World Geodetic System 1984 (G1674)"],MEMBER["World Geodetic System 1984 (G1762)"],MEMBER["World Geodetic System 1984 (G2139)"],ELLIPSOID["WGS 84",6378137,298.257223563,LENGTHUNIT["metre",1]],ENSEMBLEACCURACY[2.0]],PRIMEM["Greenwich",0,ANGLEUNIT["degree",0.0174532925199433]],ID["EPSG",4326]],CONVERSION["UTM zone 43N",METHOD["Transverse Mercator",ID["EPSG",9807]],PARAMETER["Latitude of natural origin",0,ANGLEUNIT["degree",0.0174532925199433],ID["EPSG",8801]],PARAMETER["Longitude of natural origin",75,ANGLEUNIT["degree",0.0174532925199433],ID["EPSG",8802]],PARAMETER["Scale factor at natural origin",0.9996,SCALEUNIT["unity",1],ID["EPSG",8805]],PARAMETER["False easting",500000,LENGTHUNIT["metre",1],ID["EPSG",8806]],PARAMETER["False northing",0,LENGTHUNIT["metre",1],ID["EPSG",8807]]],CS[Cartesian,2],AXIS["(E)",east,ORDER[1],LENGTHUNIT["metre",1]],AXIS["(N)",north,ORDER[2],LENGTHUNIT["metre",1]],USAGE[SCOPE["Engineering survey, topographic mapping."],AREA["Between 72°E and 78°E, northern hemisphere between equator and 84°N, onshore and offshore. China. India. Kazakhstan. Kyrgyzstan. Maldives. Pakistan. Russian Federation. Tajikistan."],BBOX[0,72,84,78]],ID["EPSG",32643]]"';
 
coordinate_system_string = '{PROJCS["WGS_1984_UTM_Zone_43N",GEOGCS["GCS_WGS_1984",DATUM["D_WGS_1984",SPHEROID["WGS_1984",6378137.0,298.257223563]],PRIMEM["Greenwich",0.0],UNIT["Degree",0.0174532925199433]],PROJECTION["Transverse_Mercator"],PARAMETER["False_Easting",500000.0],PARAMETER["False_Northing",0.0],PARAMETER["Central_Meridian",75.0],PARAMETER["Scale_Factor",0.9996],PARAMETER["Latitude_Of_Origin",0.0],UNIT["Meter",1.0]]}';
 
 % Let's say you have a cell array of strings
listOfStrings = {'-------';'map info : ';map_info;'-------';'projection info : '; projection_info;'-------';'coordinate system : '; coordinate_system_string};

% Open a new text file for writing
fileID = fopen('output.txt', 'w');

% Check if the file was opened successfully
if fileID == -1
    error('File could not be opened.');
end

% Write each string in the cell array to the file on a new line
for i = 1:length(listOfStrings)
    fprintf(fileID, '%s\n', listOfStrings{i});
end

% Close the file
fclose(fileID);

[Tyann Hardyn]

OMG, i dont ever think that it can use printf to store the result of webread before. Thank you so much, SIr

[Mathieu NOE]

no problem , my pleasure !

[Stephen23]

"FYI, if you have arrays of strings or char..."

simpler:

txt = webread("https://kp.gfz-potsdam.de/kpdata?startdate=2024-05-21&enddate=2024-05-26&format=kp1#kpdatadownload-143");
writelines(txt,'myfile.txt')

Checking:

type myfile.txt

2024 05 21 33744 33744.5 2602  4  1.667  1.000  1.000  2.667  2.667  2.333  1.667  1.667    6    4    4   12   12    9    6    6     7 165    190.8    195.4 0
2024 05 22 33745 33745.5 2602  5  1.667  0.667  0.333  0.333  0.000  0.667  1.333  1.333    6    3    2    2    0    3    5    5     3 152    195.7    200.6 0
2024 05 23 33746 33746.5 2602  6  0.667  1.667  1.667  2.333  2.333  1.667  2.333  4.000    3    6    6    9    9    6    9   27     9 134    176.2    180.7 0
2024 05 24 33747 33747.5 2602  7  2.000  3.000  2.667  3.000  2.000  1.333  0.333  1.333    7   15   12   15    7    5    2    5     8 126    162.8    167.0 0
2024 05 25 33748 33748.5 2602  8  1.667  1.333  1.333  0.667  0.667  1.667  1.333  2.333    6    5    5    3    3    6    5    9     5 104    152.4    156.4 0
2024 05 26 33749 33749.5 2602  9  1.333  2.333  1.000  2.000  2.667  2.667  2.667  1.000    5    9    4    7   12   12   12    4     8 120    155.6    159.7 0

[Tyann Hardyn]

Thank you so much, Stephen23, thats very helpful too

[Mathieu NOE]

yes indeed, but only for R2022a and above !