657
edits
Cookbook: Difference between revisions
Jump to navigation
Jump to search
→User input
Carandraug (talk | contribs) |
|||
| Line 186: | Line 186: | ||
== Plotting == | == Plotting == | ||
== | == Input/Ouput == | ||
=== Create a text table with fprintf=== | |||
(A funny formatting trick with fprintf found by chance) | |||
Imagine that you want to create a text table with fprintf with 2 columns of 15 characters width and both right justified. How to do this thing? | |||
That's easy: | |||
If the variable Text is a cell array of strings (of length <15) with two columns and a certain number of rows, simply type for the kth row of Text | |||
fprintf('%15.15s | %15.15s\n', Text{k,1}, Text{k,2}); | |||
The syntax '%<n>.<m>s' allocates '<n>' places to write chars and display the '<m>' first characters of the string to display. | |||
Example: | |||
octave:1> Text={'Hello','World'}; | |||
octave:2> fprintf('%15.15s | %15.15s\n', Text{1,1}, Text{1,2}) | |||
Hello | World | |||
===Load comma separated values (*.csv) files=== | |||
A=textread("file.csv", "%d", "delimiter", ","); | |||
B=textread("file.csv", "%s", "delimiter", ","); | |||
inds = isnan(A); | |||
B(!inds) = num2cell(A(!inds)) | |||
This gets you a 1 column cell array. You can reshape it to the original size by using the <code>reshape</code> function | |||
The next version of octave (3.6) implements the <code>CollectOutput</code> switch as seen in example 8 here: http://www.mathworks.com/help/techdoc/ref/textscan.html | |||