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POHow to grep all the data in a specified col from standard output?
 

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  1. POHow to grep all the data in a specified col from standard output?
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    <p>Now i have a standard output which is printed by my program and displayed on the screen. The outputs looks like the following part:</p> <pre><code>Parsing command line string 'InputFile = foreman.qcif'. Parsing command line string 'NumberReferenceFrames = 1'. Parsing command line string 'QPISlice = 24'. Parsing command line string 'QPPSlice = 24'. ------------------------------- JM 11.0 (FRExt) -------------------------------- Input YUV file : foreman.qcif Output H.264 bitstream : test.264 Output YUV file : test_rec.yuv YUV Format : YUV 4:2:0 Frames to be encoded I-P/B : 150/0 PicInterlace / MbInterlace : 0/0 Transform8x8Mode : 1 ------------------------------------------------------------------------------- Frame Bit/pic QP SnrY SnrU SnrV Time(ms) MET(ms) Frm/Fld Ref ------------------------------------------------------------------------------- 0000(NVB) 168 0000(IDR) 34280 24 39.724 41.720 43.998 286 0 FRM 1 0002(P) 7432 24 38.857 41.565 43.829 402 99 FRM 1 0004(P) 8976 24 38.642 41.275 43.698 409 97 FRM 1 0006(P) 8344 24 38.427 41.266 43.515 407 99 FRM 1 0008(P) 8224 24 38.609 41.082 43.524 413 94 FRM 1 0010(P) 7784 24 38.655 40.991 43.235 406 95 FRM 1 0012(P) 7136 24 38.534 40.687 43.273 411 95 FRM 1 0014(P) 6688 24 38.464 40.756 43.146 410 92 FRM 1 0016(P) 7720 24 38.516 40.585 42.851 410 91 FRM 1 0018(P) 6864 24 38.474 40.631 42.958 411 101 FRM 1 0020(P) 8392 24 38.433 40.607 42.646 415 99 FRM 1 0022(P) 9744 24 38.371 40.554 42.498 416 94 FRM 1 0024(P) 8368 24 38.362 40.531 42.380 417 93 FRM 1 0026(P) 7904 24 38.414 40.586 42.415 418 95 FRM 1 0028(P) 8688 24 38.403 40.523 42.366 418 96 FRM 1 0030(P) 9128 24 38.545 40.390 42.661 416 89 FRM 1 0032(P) 9664 24 38.399 40.538 42.740 413 88 FRM 1 0034(P) 8928 24 38.394 40.590 42.852 414 95 FRM 1 0036(P) 10024 24 38.423 40.562 42.697 415 92 FRM 1 0038(P) 9320 24 38.442 40.389 42.689 414 94 FRM 1 0040(P) 7304 24 38.404 40.487 42.884 410 90 FRM 1 0042(P) 8560 24 38.447 40.590 42.673 411 95 FRM 1 </code></pre> <p>.......</p> <p>Now I only need to process the 4th col of SnrY. </p> <p>So, my question is how to grep this rol and to store them in a data.txt file?</p> <p>Then I can use plot tool or Matlab to plot the data trends with these data..</p> <p>Any advices? Many thanks for your kind help!</p> <p>Addition:</p> <p>Since it needs to pick those data from standard output, do I need to use(add) the command provided by you in the command line to make it works during outputs those data ? </p>
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