Unknown Error

EDU>> fid = csvread(uigetfile({'*.csv';'*.txt';'*.dat'}, 'Select the CV File'), 2, 1, 'eof');
??? Attempted to access range(3); index out of bounds because numel(range)=0.

Error in ==> dlmread at 108
    if r > range(3) || c > range(4), result= []; return, end

Error in ==> csvread at 54
    m=dlmread(filename, ',', r, c, rng);

The top is the line I am trying to execute and the bottom is the subsequent error message I am receiving. I have tried trouble shooting it myself but I am not sure what the problem is. Can anyone help?

Answer 1

[Richard Brown]

The fourth argument to csvread should be a range, i.e. a vector with four entries. You have 'eof'. Try removing this argument and see if this fixes your problem.

[Lukas]

EDU>> fid = csvread(uigetfile({'*.csv';'*.txt';'*.dat'}, 'Select the CV File'), 2, 1);

??? Error using ==> textscan

Mismatch between file and format string.

Trouble reading number from file (row 1, field 2) ==> C-V S

Error in ==> csvread at 52

m=dlmread(filename, ',', r, c);

That is the response I get. :(

Answer 2

[Walter Roberson]

csvread() cannot be used for files that have text headers. Not even when you specify the row and column.

If you have text headers, use textscan() directly.

[Lukas]

So the reason why I was trying cvsread is because I still am unclear as to how textscan works. Its output is a cell array correct? Do I have to use fopen to use textscan because I was getting errors associated with fopen (I believe anyway). If I can get it to work, I should be able to search within the cell array for at least partial matches for strings to identify a specific line correct? How can I specify a string and the have the remaining portion of the string to the end of the line be saved as a separate array/matrix?

[Walter Roberson]

For the case of a file that is numeric except for header lines:

numheader = 1; %adjust to the actual number of headers

numcol = 7; %adjust to the actual number of columns

thisfmt = repmat('%f', 1, numcol);

fid = fopen('CV US Protocol_BD1726-54 1000ud1.csv', 'rt');

C = textscan(fid, thisfmt, 'Delimiter', ',', 'HeaderLines', numheader);

fclose(fid);

If this is not what your file looks like, then a sample of your file would help.

[Lukas]

The response I get when I load the code

fid = fopen(uigetfile({'*.csv';'*.txt';'*.dat'}, 'Select the CV File'), 'rt');

Just in the command window I get fid=-1 meaning that it couldnt open the file correct?

[Lukas]

...one add on to that, I get that response obviously after I have selected the file.

Answer 3

[Lukas]

I also have tried using fopen directly

EDU>> fid = fopen('CV US Protocol_BD1726-54 1000ud1.csv')

fid =

       3

EDU>> C = textscan(fid, 'r')

C = 

     Empty cell array: 1-by-0

To try and put the data into a cell array but as you can see, for some reason, the cell array is emtpy. Can anyone help me figure this out? Thanks

Answer 4

[Lukas]

SetupTitle, CV US Protocol
PrimitiveTest, C-V Sweep
TestParameter, Channel.UnitTyp, CMU
TestParameter, Channel.Unit, CMU1:MF/SC
TestParameter, Channel.IName, 
TestParameter, Channel.VName, VBias
TestParameter, Channel.Mode, 
TestParameter, Channel.Func, VAR1
TestParameter, Channel.Index, 
TestParameter, Channel.Time, 
TestParameter, Measurement.Primary.Locus, Single
TestParameter, Measurement.Primary.Scale, LINEAR
TestParameter, Measurement.Primary.Start, -10
TestParameter, Measurement.Primary.Stop, 10
TestParameter, Measurement.Primary.Step, 0.1
TestParameter, Measurement.Aborting.Condition, CONTINUE AT ANY
TestParameter, Measurement.PostOutput.Value, START
TestParameter, Measurement.PostOutput.Retention, OFF
TestParameter, Measurement.Secondary.ACLevel, 0.03
TestParameter, Measurement.Secondary.FName, Freq
TestParameter, Measurement.Secondary.Frequency, 1000000, 100000, 10000, 1000
TestParameter, Measurement.Bias.Source, 0
TestParameter, Measurement.ImpedanceMode.Model, Cp-G
TestParameter, Measurement.ImpedanceMode.CName, C

    *....... I cut out the whole header just to give you a portion of it but it is 200+ lines if strings (obviously asymmetric in columns) * 

AnalysisSetup, Analysis.Setup.Vector.List.Datum.Name, VBias, C, G
AnalysisSetup, Analysis.Setup.Vector.List.Datum.Unit, V, F, S
AnalysisSetup, Analysis.Setup.Preference.GraphVisible, true
AnalysisSetup, Analysis.Setup.Preference.ListVisible, true
AnalysisSetup, Analysis.Setup.Preference.ScalarVisible, true
AnalysisSetup, Analysis.Setup.Title, CV US Protocol
Dimension1, 201, 201, 201
Dimension2, 4, 4, 4
DataName, VBias, C, G
DataValue, -10, 7.14698E-11, 7.31843E-06
DataValue, -9.9, 7.2232999999999992E-11, 3.75349E-06
DataValue, -9.8, 7.26777E-11, 5.50536E-06
DataValue, -9.7000000000000011, 7.28037E-11, 4.36322E-06
DataValue, -9.6, 7.33505E-11, 4.8255199999999995E-06
DataValue, -9.5, 7.37495E-11, 2.7934899999999997E-06
DataValue, -9.4, 7.36746E-11, 7.22263E-06
DataValue, -9.3, 7.46931E-11, 6.51808E-06

Anyway, there is a blank space line at the start that is not shown. I am interested in the frequencies listed on line 21 and then obviously the data on line listing 'DataValue'

Any help would be greatly appreciated. :)

Answer 5

[Image Analyst]

csvread expects a bunch of numbers, not mixed numbers and text, and different numbers of things on each line, like you have:

AnalysisSetup, Analysis.Setup.Title, CV US Protocol
Dimension1, 201, 201, 201
Dimension2, 4, 4, 4
DataName, VBias, C, G
DataValue, -10, 7.14698E-11, 7.31843E-06

Since each line is so vastly different, you might have to read each line with fgetl() or fgets() and parse each line depending on what it looks like.

[Lukas]

Its not possible to treat each line as a string and input into a cell array?

[Image Analyst]

You can do that if you want. Read each line in one at a time like I said, parse it into things between the commas (you can use allwords for that http://www.mathworks.com/matlabcentral/fileexchange/27184-allwords) and then put those sentence fragments into cells.

[Lukas]

Thanks, I will give it a try