textscan

How do I read the rest of a line of a text file in MATLAB with TEXTSCAN?

由 时光怂恿深爱的人放手 提交于 2019-12-13 01:45:34
问题 I am trying to read a text file with data according to a specific format. I am using and textscan together with a string containing the format to read the whole data set in one code line. I've found how to read the whole line with fgetl , but I would like to use as few code lines as possible. So I want to avoid own for loops. textscan seems great for that. As an example I'll include a part of my code which reads five strings representing a modified dataset, its heritage (name of old dataset),

Reading text file in Matlab results in unknown spaces within characters

由 女生的网名这么多〃 提交于 2019-12-12 01:09:03
问题 I am trying to read a text/csv file in Matlab.The file looks like: VolumeDisplacement,9783.47 CenterOfBuoyancy,-0.732585,3.16072e-14,-3.09939 WettedSurfaceArea,2709.66 WaterlineLength,102.156 MaximumWaterlineBeam,20.76 WaterPlaneArea,1774.4 CenterOfFloatation,-6.32016,1.00108e-11,0 The file is generated using vbscript in Rhinoceros . I am using the standard method given in the help file, but encountering a weird problem. filename = 'RhinoResult.txt'; fid = fopen(filename); line = fgetl(fid);

Average of values from a column/ Skip lines (textscan)

由 。_饼干妹妹 提交于 2019-12-11 06:17:18
问题 I have a .txt file which looks like this: ******text******* (30 lines containing text and *) ******text******* a b c a b c a b c a b c a b c a b c a b c (I'm creating a plot with a as x and b and c as y1 and y2) How do I skip those 30 lines with textscan? I had this but it didn't work: [x y1 y2] = textscan('file_name.txt', '%f %f %f', 30); And more: how to I make the average of the values of third column? 回答1: How do I skip certain lines from being processed? You have a few options regarding

textscan in MATLAB: read NULL value as NaN

由 ﹥＞﹥吖頭↗ 提交于 2019-12-10 23:02:13
问题 I have a .txt file with the following data: sampleF.txt --> (tab delimited) MSFT 200 100 APPL 10 NULL AMZN 20 40 I need to read this data using textscan . I am facing a problem while reading the NULL data. Using treatasempty param, I can read it as 0. But I want to read it as NaN . Please help! Thanks! fName = '.....\sampleF.txt' [fid, message] = fopen(fName) ; if fid < 0, disp(message), else datatxt = textscan(fid, '%q %d %d', 'Delimiter', '\t','treatAsEmpty','NULL'); datatxt = [ datatxt {1}

Textscan on file with large number of lines

由 拈花ヽ惹草 提交于 2019-12-07 06:31:52
问题 I'm trying to analyze a very large file using textscan in MATLAB. The file in question is about 12 GB in size and contains about 250 million lines with seven (floating) numbers in each (delimited by a whitespace); because this obviously would not fit into the RAM of my desktop, I'm using the approach suggested in the MATLAB documentation (i.e. loading and analyzing a smaller block of the file at a time. According to the documentation this should allow for processing "arbitrarily large

textscan in Matlab uses excessive RAM compared to similar method in R

由 筅森魡賤 提交于 2019-12-07 04:06:03
问题 I run Matlab R2011b and R version 2.13.1 on Linux Mint v12 with 16 GB of RAM. I have a csv file. The first 5 rows (and header) is: #RIC,Date[G],Time[G],GMT Offset,Type,Price,Volume DAEG.OQ,07-JUL-2011,15:10:03.424,-4,Trade,1.68,1008 DAEG.OQ,07-JUL-2011,15:10:03.424,-4,Trade,1.68,1008 DAEG.OQ,07-JUL-2011,15:10:03.424,-4,Trade,1.66,300 DAEG.OQ,07-JUL-2011,15:10:03.424,-4,Trade,1.65,1000 DAEG.OQ,07-JUL-2011,15:10:03.464,-4,Trade,1.65,3180 The file is large (approx 900MB). Given the combination

Python equivalent of Matlab textscan

由 落爺英雄遲暮 提交于 2019-12-06 19:21:44
问题 I'm working with transferring some Matlab code to Python. I'm relatively new to Python and am unsure of a Python equivalent of Matlab's textscan method. Any help would be greatly appreciated. 回答1: If you're translating Matlab to Python, I'll assume you're already using NumPy. In that case, you can use np.loadtxt (if no values are missing) or np.genfromtxt (if there are missing values: I'm not sure whether Matlab's textscan handles that). Give us a few more details if you need more help! 回答2:

Python equivalent of Matlab textscan

由 依然范特西╮ 提交于 2019-12-05 02:18:28
I'm working with transferring some Matlab code to Python. I'm relatively new to Python and am unsure of a Python equivalent of Matlab's textscan method. Any help would be greatly appreciated. If you're translating Matlab to Python, I'll assume you're already using NumPy. In that case, you can use np.loadtxt (if no values are missing) or np.genfromtxt (if there are missing values: I'm not sure whether Matlab's textscan handles that). Give us a few more details if you need more help! Example of conversion of MATLAB's textscan to Python + NumPy's np.loadtxt : Let our data file results.csv contain

MATLAB: how to read every Nth line of a text file?

由 [亡魂溺海] 提交于 2019-12-03 20:29:50
问题 I have some data that's formatted as follows: dtau E_av variance N_sims Time 0.001 0.497951 0.000211625 25 Sun Apr 3 18:18:12 2011 dtau E_av variance N_sims Time 0.002 0.506784 0.000173414 25 Sun Apr 3 18:18:58 2011 Now I want to read the first 4 columns (anything but the time) of every third line into MATLAB using textscan; after using fid = fopen('data.text') , I basically have to loop this: results = textscan(fid, '%f %f %f %f', 1,'headerlines',1); Any ideas? Cheers! 回答1: fid = fopen('data

MATLAB: how to read every Nth line of a text file?

由 柔情痞子 提交于 2019-11-30 16:28:52
I have some data that's formatted as follows: dtau E_av variance N_sims Time 0.001 0.497951 0.000211625 25 Sun Apr 3 18:18:12 2011 dtau E_av variance N_sims Time 0.002 0.506784 0.000173414 25 Sun Apr 3 18:18:58 2011 Now I want to read the first 4 columns (anything but the time) of every third line into MATLAB using textscan; after using fid = fopen('data.text') , I basically have to loop this: results = textscan(fid, '%f %f %f %f', 1,'headerlines',1); Any ideas? Cheers! fid = fopen('data.text') while ~feof(fid) results = textscan(fid, '%f %f %f %f', 1,'headerlines',1); //Processing... for i =
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