Plot graph from Text data

Dear Sir,

I have Text data which part of data was shown below:

           -197           -196           -187           -172           -174
           -173           -157           -135           -112           -106
           -106            -98           -100           -106           -107
           -119           -122           -100            -86           -109
           -122            -95            -80            -84            -75
            -37            -20            -29            -16              4
             23             33             44             67             80
            100            113            103            107            128
            138            126            116            112             98
             76             50             44             
             -1            -23            -48            -76           -102
           -121           -142           -159           -188           -221
           -245           -274           -284           -291           -309
           -305           -296           -312           -331           -320
           -313           -322           -311           -288           -262
           -252           -251           -237           -230           -229
           -220           -209           -189           -170           -169
           -177           -189           -188           -188           -194
           -196           -207           -209           -205           -205
           -206           -205           -210           -211           -189
           -174           -172           -161           -155           -162
           -169           
           -189           -183           -165           -143           -129
           -120           -108            -84            -59            -42
            -26             -4             28             54             71
             96            121            137            131            118
            120            123            131            128            100
             71             64             63             49             38

The sampling rate of data was 20Hz that started at 00:00:00UT. But I don't know the end of time of sampling rate. Can you help me plot a graph from this data? The x axis should be time (UT) and y axis should be data as above. We should begin from the first row to the last row. Thank you very much.

Regards, Aike

Answer 1

[Fangjun Jiang]

Take a look at the data again. There are blank spot in a few places. Are they supposed to be that way, or are they some type of line wrapping errors?

You can use importdata() to read the data. It fills NaN for those blank spots. It's also easy to tell how many rows are in the data using function size(data,1). Then, since the sample rate is fixed, it's pretty easy to generate the time stamps. You could do some extra to get the actual time, 00:00:01UT for example, instead of 1 second in the below example.

y=importdata('test.txt');
f=20;
ts=1/f;
x=ts*(1:size(y,1));
plot(x,y)

Answer 2

[shravankumar]

hi,

you can also use    y=dlmread('test.txt'). I think it takes the blank elements as zero and gives a continuous curve.

shravan.

Answer 3

[Aike]

Thank you for all suggestions. I already solved my problem from you all suggestions. Thank you very much.

Aike