Error using dataread. Number of outputs must match the number of unskipped input fields. Error in textread line Then I changed the code to this:. Which in turn returned the following errors:. Using spcread. This gave the following error:.
Number of outputs must match the number of unskipped input fields. Error in textread line Then I changed the code to this:. Which in turn returned the following errors:. Using spcread. This gave the following error:. Undefined function or variable 'spcread'. Using importdata. I had limited success with this, but this was as far as I could go This gave me a 1x1 struct file with a x2 double comprising of the first lines of the text file and a 2x1 cell with the first two header lines. I then removed all the header files which did import the entire data, albeit without all headers and would require splitting into multiple matrices to be able to plot all of the runs in one graph because if I recall correctly, plot function doesn't support dot indexing for variables of the form A.
Could someone help me import the data properly so that I can move to plotting the curves? Accepted Answer. Stephen on 18 May Cancel Copy to Clipboard.
Edited: Stephen on 18 May Importing the entire file data as character, converting to string, spltting that string into multiple little strings, and then finally converting those many little strings to numeric is convoluted, an inefficient use of memory because on each of those conversions you duplicate the data in MATLAB memory , and involves multiple data type conversions also inefficient.
The most efficient way to import the data is to get the importing routine to directly convert the data to numeric, for example very simply using textscan no data duplication required :. Giving all eleven groups of data:. Take a quick look at the imported data:. Converting the intermediate header data to numeric is trickier because some of them include SI prefixes e.
If the goal is to plot the data, then two small tweaks to the above code makes that very easy:. Then a simple comma-separated list with plot is all you need:. Pratyush Manocha on 18 May Thanks for your answer. While it does seem optimally efficient by invoking the minimum number of reads and data conversions and entirely eliminating the need if a temporary buffer to store the data, it is a tad too complex for me to understand.
I have a few questions to ask you regarding the same. Could you expand on these points a bit? I prefer to define textscan 's optional arguments in a cell array like that because:. Stack Overflow for Teams — Collaborate and share knowledge with a private group. Create a free Team What is Teams? Collectives on Stack Overflow. Learn more. Asc files and Matlab: How to read the coordinates Ask Question. Asked 9 years, 9 months ago. Active 9 years, 8 months ago.
Viewed 1k times. The asc file is as follows sorry it is huge! Can I then ask matlab to output the appropriate matrix values when I put in coordinates? Thanks everyone who can offer me advice! All values in the file other than headers must be numeric. When the dlmread function reads data files with lines that end with a nonspace delimiter, such as a semicolon, it returns a matrix, M , that has an additional last column of zeros. This table shows valid forms for a complex number.
Embedded white space in a complex number is invalid and dlmread regards it as a field delimiter. There are no plans to remove dlmread.
Starting in Ra, use the readmatrix function to read a matrix from a delimited text file. The readmatrix function has these advantages over the dlmread function:. Ability to use import options to control the data import process, including the handling of errors and missing data.
This table shows typical usages of dlmread and how to update your code to use readmatrix instead. Choose a web site to get translated content where available and see local events and offers. Based on your location, we recommend that you select:. Select the China site in Chinese or English for best site performance. Other MathWorks country sites are not optimized for visits from your location. Toggle Main Navigation. Search MathWorks.
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