When using textscan how do I process repeating data?

Question

Joseph Koval 2018-5-31

0
链接

此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/403325-when-using-textscan-how-do-i-process-repeating-data

评论： Joseph Koval 2018-5-31

I have a file that looks like below. It has repeating blocks with a header line followed by a non-constant number of data lines, and then a line containing the characters "&&" denoting the end of each block. I want textscan to know to stop reading at the end of a data line and "reset" when it reaches the line with the "&&".

I've tried different iterations of this code below and it doesn't work. It reads past the && and right into the next section (i.e. it matches the next "K04V" and then stops, I believe because the first %s in the formatSpec = '%s %f %f %f %f' line allows it to match the K04V

while ~feof(fileID)
N = 7
C_header = textscan(fileID,'%s',N,'Delimiter',',')
formatSpec = '%s %f %f %f %f';
C_data1 = textscan(fileID,formatSpec,'Delimiter',',','CollectOutput',1,'EmptyValue', NaN)
end

Data file snippet...

K04V, T_2M_AGL, FH000, model value, bias,  weight, contribution
gfs[0] 20180530 12Z, 290.8087, -0.4281, 0.0336, 9.7993
gfs[1] 20180530 06Z, 289.2202, -0.4313, 0.0000, 0.0000
gefs[0] 20180530 12Z, 292.7851, -0.4179, 0.0000, 0.0000
gefs[1] 20180530 06Z, 293.1193, -0.2692, 0.0000, 0.0000
ecmwf[0] 20180530 12Z, 295.8952, -1.1245, 0.2291, 68.0363
ecmwf[1] 20180530 00Z, 295.2336, -0.9495, 0.0568, 16.8291
ecmwf_ensmean[0] 20180530 12Z, 294.0368, -1.0981, 0.0018, 0.5348
ecmwf_ensmean[1] 20180530 00Z, 293.5686, -0.9417, 0.0000, 0.0000
nam[0] 20180530 18Z, 292.0365, -0.8670, 0.1626, 47.6361
nam[1] 20180530 12Z, 286.7009, -0.8776, 0.0971, 27.9369
mav_mos[0] 20180530 12Z, 294.0023, 0.0071, 0.1256, 36.9327
mav_mos[1] 20180530 06Z, 292.5631, 0.0170, 0.0196, 5.7442
eta_mos[0] 20180530 12Z, 283.1483, 0.2278, 0.0826, 23.3628
eta_mos[1] 20180530 00Z, 289.8123, 0.6199, 0.0733, 21.1937
gridded_mos[0] 20180530 12Z, 292.9989, 0.1147, 0.0527, 15.4304
gridded_mos[1] 20180530 00Z, 292.5909, 0.0562, 0.0000, 0.0000
rpm_conus[0] 20180530 18Z, 288.5560, -1.6245, 0.0651, 18.8827
rpm_conus[1] 20180530 15Z, 292.1360, -1.6092, 0.0000, 0.0000
rpm_global[0] 20180530 12Z, 291.1134, -1.2081, 0.0000, 0.0000
rpm_global[1] 20180530 06Z, 291.1059, -1.3080, 0.0000, 0.0000
integration, 292.2013, , 1.0000, 292.3190
&&
K04V, T_2M_AGL, FH001, model value, bias,  weight, contribution
gfs[0] 20180530 12Z, 291.6395, -0.5546, 0.0003, 0.0851
gfs[1] 20180530 06Z, 289.5999, -0.6698, 0.0000, 0.0000
gefs[0] 20180530 12Z, 292.3162, -0.5535, 0.0000, 0.0000
gefs[1] 20180530 06Z, 292.5030, -0.4473, 0.0000, 0.0000
ecmwf[0] 20180530 12Z, 294.1544, -1.2235, 0.1723, 50.8918
ecmwf[1] 20180530 00Z, 294.0405, -1.1101, 0.0185, 5.4496
ecmwf_ensmean[0] 20180530 12Z, 292.6239, -1.4880, 0.0092, 2.7174
ecmwf_ensmean[1] 20180530 00Z, 292.3820, -1.3889, 0.0000, 0.0000
nam[0] 20180530 18Z, 289.7563, -1.0246, 0.1322, 38.4438
nam[1] 20180530 12Z, 290.5151, -0.9916, 0.1032, 30.0920
mav_mos[0] 20180530 12Z, 293.3039, -0.0930, 0.0937, 27.4987
mav_mos[1] 20180530 06Z, 292.1351, -0.0376, 0.0142, 4.1633
eta_mos[0] 20180530 12Z, 289.9943, 0.1156, 0.0439, 12.7170
eta_mos[1] 20180530 00Z, 291.7776, 0.6356, 0.0928, 27.0132
gridded_mos[0] 20180530 12Z, 292.3479, 0.0019, 0.1417, 41.4112
gridded_mos[1] 20180530 00Z, 291.9238, 0.0423, 0.0356, 10.4014
rpm_conus[0] 20180530 18Z, 290.7409, -1.4553, 0.0932, 27.2218
rpm_conus[1] 20180530 15Z, 290.4744, -1.3876, 0.0492, 14.3585
rpm_global[0] 20180530 12Z, 290.2267, -0.9666, 0.0000, 0.0000
rpm_global[1] 20180530 06Z, 290.5519, -1.0132, 0.0000, 0.0000
integration, 292.3386, , 1.0000, 292.4647
&&