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Ian


Last seen: 2 days ago |  Active since 2014

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Answered
Stretching a rectangle over a date axis
There's a nice solution to drawing a semi-transparent colored rectangle over a plot at https://stackoverflow.com/questions/45266...

4 years ago | 1

Question


customize user prompt in console window?
Is there a way to change the user prompt from ">>" in the Matlab console window? In linux systems, this can be done for the bas...

5 years ago | 1 answer | 1

1

answer

Question


strrep is inconsistent with empty replacement strings
I have reported this as a bug. strrep responds differently when the replacement string is various flavors of empty. 'Proper' w...

5 years ago | 1 answer | 0

1

answer

Question


How does copy-on-modify operate on structs and classes?
I understand that Matlab uses "copy-on-modify" so matrices, structs and class objects are only copied inside a function when the...

5 years ago | 1 answer | 2

1

answer

Question


inconsistency when comparing cell arrays with strings vs char array
Why does matlab not compare strings & char arrays the same way in aggregate as it does individually? >> type test_input.m fu...

5 years ago | 2 answers | 3

2

answers

Answered
How can I check whether an argument is given or not (inputParser)?
A bit late to the game here, but expanding on Sean de Wolski's brief suggestion, here is a code snippet that should satisfy. Th...

6 years ago | 2

Answered
preallocate array without initializing
BL is apparently correct -- it can be done in a MEX file -- and I have located a functional solution on Matlab File Eschange: 3...

6 years ago | 0

Answered
preallocate array without initializing
A little experimenting has determined the following: z = zeros(m,n); is apparently quite fast, but only helpful if one needs...

6 years ago | 0

Question


preallocate array without initializing
Is there any way to preallocate a matrix without initializing it to either NaN's, zeros or ones? I'm working with large image...

6 years ago | 5 answers | 0

5

answers

Question


How to specify the output type of an fread(fid...) ?
fread(...) lets you specify the data type of the data to be read, but appears to always return the results in a matrix of double...

6 years ago | 1 answer | 0

1

answer

Answered
Why is an empty string not empty? isempty('') returns true, but isempty("") returns false
There have been many good suggestions above for workarounds for code going forward. Thanks all for your input. Having read and...

7 years ago | 1

Answered
Why is an empty string not empty? isempty('') returns true, but isempty("") returns false
I think I'm going to submit this to MathWorks as a bug, and see what they say.

7 years ago | 0

Answered
Why is an empty string not empty? isempty('') returns true, but isempty("") returns false
Hmmm. I suppose one could override isempty(...) Attempting to view the code for isempty(), it shows no code, just comments, th...

7 years ago | 1

Question


Why is an empty string not empty? isempty('') returns true, but isempty("") returns false
(Updated to clarify the problem) Strings, added in R2016b, are a great addition to matlab, but one aspect is a problem: test...

7 years ago | 6 answers | 3

6

answers

Answered
Show memory options in Matlab working on Mac platform
Several cmdline tools for determining physical memory on Macs. I use: [status, cmdout]=system('sysctl hw.memsize | awk ''{prin...

7 years ago | 2

Answered
If else condition to determine if a year is a leap year
ndays = datenum(Y+1,0,0) - datenum(Y,0,0); isleap = ndays == 366;

8 years ago | 0

Answered
How to keep/use last used CURRENT DIR?
In Matlab R2015a for Mac OS X, this is a setting one can change in the preferences: Preferences | Matlab | General One can...

9 years ago | 0

Answered
Converting a date string to day of year
As Tursa's example implies, matlab datenum's are numeric timestamps (of type double) that can be subtracted (to get a relative o...

9 years ago | 1

Question


setting ColorOrderIndex before 1st line is drawn?
Per Matlab documentation "Why Are Plot Lines Different", we can reset the color order to restart by using (handle).ColorOrderIn...

9 years ago | 2 answers | 0

2

answers

Question


how to use readtable with excel spreadsheets, skip extra header lines, and read to "end"?
readtable apparently doesn't support "HeaderLines" option for xls files. From documentation, it does support reading ranges lik...

9 years ago | 1 answer | 4

1

answer

Question


Why does R2015a ask for permisson to accept incoming connections?
Have just installed R2015a on OS X yosemite, and on startup, it asks whether I want to allow matlab to accept incoming connectio...

9 years ago | 1 answer | 0

1

answer

Question


How to open files in separate windows in 2014A (Mac OS X version)?
2012 & earlier allowed me to open each file in a new editor window undocked -- i.e. it is own editor window. (I vaguely recall ...

10 years ago | 0 answers | 0

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