Walter Roberson
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48.225 total contributions since 2011I do not do free private consulting. If you want to bring my attention to something, send a link to the MATLAB Answers location.
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serial communication shows huge batch istead of steady small bursts
I predict that COM4 is not a true RS232 or RS422 port, and is instead a USB port with Serial over USB. Serial over USB is defin...
30 minuti ago | 0
Can somebody help me to code this physics equation? I am confused how to describe it in code. Thank you
Lambda_1 = 24; syms lambda(T) eta_o(lambda,T) eta_e(lambda,T) DlambdaT = diff(lambda, T); Deta_oT = diff(eta_o, T); Deta_eT ...
circa un'ora ago | 0
How to change the
You are using GUIDE, which uses "traditional" figures. In traditional figures, edit boxes and text boxes cannot have color for ...
circa un'ora ago | 0
Unknown Error Message from using interp1
if year < 1990 | year > 2018 | mod(year,2) == 1 disp("This is not an even year from 1990 to 2018"); else male_vote = ...
circa un'ora ago | 0
HOW CAN I FIND THE SUBSET OF N-SET?
See the "odometer" code that I posted at https://www.mathworks.com/matlabcentral/answers/623358-get-a-combination-of-unique-path...
circa un'ora ago | 0
Warning: JPEG library error (8 bit), "Invalid SOS parameters for sequential JPEG".
https://github.com/lovell/sharp/issues/1578 Apparently the Samsung Galaxy S9 has a bug in how it creates JPEG images that lead...
circa 4 ore ago | 0
Convert vector of characters to doubles/numeric
str2double(cellstr(YourCharacterArray))
circa 4 ore ago | 0
How to apply modifiers to error messages
f = errordlg('\fontsize{3}This is my error message', 'Woops', opts); Where 'Woops' is the title to give to the dialog.
circa 5 ore ago | 1
How to import data from excel file as structure into Matlab?
T = readtable(TheFileName); TC = table2cell(T); TS = cell2struct(TC(:,2), TC(:,1), 1); TS will now be a cell with field names...
circa 6 ore ago | 0
axis labels not working
Suppose there is only one peak detected, and that everything from there on is non-increasing. * / \ \ ...
circa 8 ore ago | 0
What is the difference between flag 1 and flag 2?
https://www.mathworks.com/help/optim/ug/fmincon.html#busog7r-exitflag Exit flag 1: stopped because the optimality was low enou...
circa 8 ore ago | 0
Variable precision arithmetic in ode45 and others?
Sort of. The internal symbolic engine has two numeric ode routines. At the moment I do not know if there is a matlab level inter...
circa 9 ore ago | 0
How to generate a random decimal number between -1 and 1?
rand*2-1 Note this will not generate exactly -1 or exactly 1
circa 18 ore ago | 0
What does this syntax mean? “yyy(1,1) logical = xxx”
It is a property name, size, datatype, and initial value.
circa 19 ore ago | 0
load function doesn't load variable correctly
restoredefaultpath You are loading a custom object type. If the class definition is not on your path because you restored the d...
circa 22 ore ago | 0
| accepted
textarea: how to hold on messages
There is no property for that. If you want to add more data you need to fetch the current data and add the new data to the end ...
circa 22 ore ago | 1
Blend function - please help (MATLAB 2020b)
http://psychtoolbox.org/docs/Screen-BlendFunction "The most common alpha-blending factors are sourceFactorNew = GL_SRC_ALPHA a...
circa 22 ore ago | 0
Solve Symbolic Simultaneous equations -- Please help!!
S = solve(eqns, [a, b, c, d]);
circa 23 ore ago | 0
Is it bad practice to have nonlinear constraints array change size depending on the input solution in a genetic algorithm?
When boundaries are found to be violated, the optimizers can attempt to locate the boundary by comparing the output of the const...
circa 24 ore ago | 0
| accepted
How to convert floating point to binary bits with the given condition?
mod(a*10^4,10)>=6 Here I am taking you literally on the > 5 as not including 5 -- so it should only convert for 6, 7, 8, or 9 i...
circa 24 ore ago | 0
| accepted
the 'fmincon' optimisation doesn't stop at minimum with all possible algorithms
Change the FiniteDifferenceStepSize %% 29.10.2020 optimisation codes close all syms x; size=1e-11; C_Gmm1=[441400000,298900...
1 giorno ago | 0
How can i make this code dynamic?
bin = discretize(p, [-inf; flipud(k(:)); 100; inf]); map = [num2cell(length(k)+1:-1:1), {"Not valid output"}]; gr = map(bin); ...
1 giorno ago | 0
| accepted
set. How to do it using matlab?
logical indexing, if you are processing a vector of x values. piecewise() if you have the symbolic toolbox and you are building...
1 giorno ago | 0
Out of memory error
No. If you have any digits after the decimal point, then you are using floating point numbers, and floating point numbers do not...
1 giorno ago | 0
configureCallback unrecognized function in R2019b
configureCallback is a method build into some classes (rather than being a .m of its own.) It looks to me as of configureCallba...
1 giorno ago | 0
converting 16 bit image to 12 bit
Different programs deal with storing lower number of bits (such as 12) in higher number of bits (such as 16) in different ways. ...
2 giorni ago | 0
Extract data from a csv file in Matlab
formatIn ='yyyymmdd:HHMM'; It is questionable as to whether that is the correct format, however. Each of the entries ends in 11...
2 giorni ago | 0
Matrix index is out of range for deletion
You have a loop in which you move forward through the loop, deleting entries if some condition matches. However, every time you...
2 giorni ago | 0
Invalid text charcter .Check for unsupported symbol, invisible charcter ,or pasting of non-ASCII chatcters
Your line 7 starts with 11 occurances of char(160), which is unicode U+A0 http://www.fileformat.info/info/unicode/char/a0/index....
2 giorni ago | 0
cpu time in matlab
See timeit() Note though that timeit() deals with elapsed time rather than cpu time -- but it takes a number of steps to try to...
2 giorni ago | 0
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