how can i plot a graph using the data

Question

poshan reddy 2014-5-22

0
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此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/130599-how-can-i-plot-a-graph-using-the-data

编辑： poshan reddy 2014-5-23

this is a raw data file 
clear all;
close all;
clc;
tic;
fp1=fopen('09JL2008.r2','r');
Startheader= struct('npar',fread(fp1,1,'int16'),...
                  'nwds',fread(fp1,1,'int16'),...
                  'nrgb',fread(fp1,1,'int16'),...
                  'nfft',fread(fp1,1,'int16'),...
                  'ncoh',fread(fp1,1,'int16'),...
                  'nicoh',fread(fp1,1,'int16'),...
                  'ipp',fread(fp1,1,'int16'),...
                  'pwd',fread(fp1,1,'int16'),...
                  'cflag',fread(fp1,1,'int16'),...
                  'nwin',fread(fp1,1,'int16'),...
                  'w1start',fread(fp1,1,'int16'),...
                  'w1len',fread(fp1,1,'int16'),...
                  'w2start',fread(fp1,1,'int16'),...
                  'w2len',fread(fp1,1,'int16'),...
                  'year',fread(fp1,1,'int16'),...
                  'month',fread(fp1,1,'int16'),...
                  'day',fread(fp1,1,'int16'),...
                  'hour',fread(fp1,1,'int16'),...
                  'min',fread(fp1,1,'int16'),...
                  'sec',fread(fp1,1,'int16'),...
                  'nbeam',fread(fp1,1,'int16'),...
                  'beam',fread(fp1,1,'int16'),...
                  'scan',fread(fp1,1,'int16'));
timestart=sprintf('%d:%d:%d.',Startheader.hour,Startheader.min,Startheader.sec);
secstart=(Startheader.hour*3600+Startheader.min*60+Startheader.sec);
fseek(fp1,-(8*Startheader.nrgb*Startheader.nfft+128),1);
%for be=1:5
header= struct('npar',fread(fp1,1,'int16'),...
             'nwds',fread(fp1,1,'int16'),...
             'nrgb',fread(fp1,1,'int16'),...
             'nfft',fread(fp1,1,'int16'),...
             'ncoh',fread(fp1,1,'int16'),...
             'nicoh',fread(fp1,1,'int16'),...
             'ipp',fread(fp1,1,'int16'),...
             'pwd',fread(fp1,1,'int16'),...
             'cflag',fread(fp1,1,'int16'),...
             'nwin',fread(fp1,1,'int16'),...
             'w1start',fread(fp1,1,'int16'),...
             'w1len',fread(fp1,1,'int16'),...
             'w2start',fread(fp1,1,'int16'),...
             'w2len',fread(fp1,1,'int16'),...
             'year',fread(fp1,1,'int16'),...
             'month',fread(fp1,1,'int16'),...
             'day',fread(fp1,1,'int16'),...
             'hour',fread(fp1,1,'int16'),...
             'min',fread(fp1,1,'int16'),...
             'sec',fread(fp1,1,'int16'),...
             'nbeam',fread(fp1,1,'int16'),...
             'beam',fread(fp1,1,'int16'),...
             'scan',fread(fp1,1,'int16'));
nbeam=header.nbeam;
nrgb=header.nrgb;
nfft=header.nfft;
ncoh=header.ncoh;
nicoh=header.nicoh;
ipp=header.ipp;
pwd=header.pwd;
scan=header.scan;
header.day;
header.month;
header.year;
header.hour;
header.min;
header.sec;
beamdate = sprintf('%2d-%d-%4d.', header.day,header.month,header.year);
timeend = sprintf('%d:%d:%d.',header.hour,header.min,header.sec);
secend=(header.hour*3600+header.min*60+header.sec);
%%%data read
  nrgb=150;nfft=512;
  for rb=1:nrgb
          for nft=1:nfft
              datI(rb,nft)=fread(fp1,1,'float32');
              datQ(rb,nft)=fread(fp1,1,'float32');
           end
  end

how to load time with the above information and how i can plot a graph in time series using datI and datQ separately i want a datI in timeseries separately and datQ separately with respect to timeseries

2 个评论
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dpb 2014-5-22

Seems peculiar request -- aren't the dat arrays a fft at a time, not timeseries data? Or are you meaning something like a waterfall plot of the spectra or somesuch?

What is the time step in the series?

poshan reddy 2014-5-23

编辑：poshan reddy 2014-5-23

no sir it is a radar raw data file as per this file i got a header file.this file contain starting time and end time .exactly i want to plot two channels that is i and q channels .i am succeed up-to that but unfortunately .i don't know how to plot it into time series by using that data

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