在Matlab中导入CSV文件

Question

I need your help to import some csv files into matlab. They have the following format

#CONTENT
Class,Category,Level,Form
xxxxx,xxxxx,1.0,1

#DATA_GENERATION
Date,Agency,Version,ScientificAuthority
2010-04-08,INME,1.0,XXX xxx xxxx

#PLATFORM
Type,ID,Name,Country,GAW_ID
STN,308,xxxx,xxx

#INSTRUMENT
Name,Model,Number
ECC,6A,6A23500

#LOCATION
Latitude,Longitude,Height
25,-3,631.0

#TIMESTAMP
UTCOffset,Date,Time
+00:00:00,2010-04-07,10:51:00
* SOFTWARE: SNDPRO 1.321
* TROPOPAUSE IN MB 184
* 

#FLIGHT_SUMMARY
IntegratedO3,CorrectionCode,SondeTotalO3,CorrectionFactor,TotalO3,WLCode,ObsType,Instrument,Number
328.4,0,379.9

#AUXILIARY_DATA
MeteoSonde,ib1,ib2,PumpRate,BackgroundCorr,SampleTemperatureType,MinutesGroundO3
RS92-SGPW,,,,Pressure,Pump

#PUMP_CORRECTION
Pressure,Correction
2.0,1.171
3.0,1.131
5.0,1.092
10.0,1.055
20.0,1.032
30.0,1.022
50.0,1.015
100.0,1.011
200.0,1.008
300.0,1.006
500.0,1.004
1000.0,1.000

#PROFILE
Pressure,O3PartialPressure,Temperature,WindSpeed,WindDirection,LevelCode,Duration,GPHeight,RelativeHumidity,SampleTemperature
945.36,4.590,14.6,10.0,30,2,0,631,43,22.8
944.90,4.620,14.3,7.8,20,0,2,635,44,22.8
943.51,4.630,13.9,7.6,17,0,4,647,44,22.8
942.13,4.620,13.4,8.1,16,0,6,660,45,22.8
940.98,4.590,13.0,9.0,16,0,8,670,45,22.8
939.83,4.590,12.6,9.8,17,0,10,680,46,22.8
938.69,4.600,12.1,10.3,18,2,12,691,46,22.8
937.77,4.600,12.2,10.9,18,0,14,699,47,22.9
936.63,4.600,12.1,11.4,19,0,16,709,47,22.9
935.48,4.600,11.8,11.9,19,0,18,719,47,22.9
934.12,4.600,11.7,12.3,19,0,20,731,47,22.9
932.98,4.590,11.6,12.6,19,0,22,742,48,22.9
931.84,4.590,11.6,12.9,18,0,24,752,48,22.9
930.93,4.600,11.6,13.2,18,0,26,760,48,22.9
929.79,4.600,11.4,13.4,17,0,28,770,49,22.9
928.88,4.610,11.5,13.6,16,0,30,778,49,22.9
927.98,4.620,11.4,13.7,15,0,32,787,49,23.0
927.30,4.620,11.3,13.8,14,0,34,793,49,23.0

The first line of the file is empty and second line contains the #CONTENT . I would like to have in a matrix all data that are under the line Pressure,O3PartialPressure,Temperature,WindSpeed,WindDirection,LevelCode,Duration,GPHeight,RelativeHumidity,SampleTemperature

Answer 1

Use the csvread() function. From the documentation :

csvread Read a comma separated value file. M = csvread('FILENAME') reads a comma separated value formatted file FILENAME. The result is returned in M. The file can only contain numeric values.

In your case, since you want to exclude all of the content up until the #PROFILE data, you would have to know the line number of the data you're interested in in advance, then use one of the following uses (again from the documentation):

 M = csvread('FILENAME',R,C) reads data from the comma separated value formatted file starting at row R and column C. R and C are zero- based so that R=0 and C=0 specifies the first value in the file. M = csvread('FILENAME',R,C,RNG) reads only the range specified by RNG = [R1 C1 R2 C2] where (R1,C1) is the upper-left corner of the data to be read and (R2,C2) is the lower-right corner. RNG can also be specified using spreadsheet notation as in RNG = 'A1..B7'.