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Need help with FFT of a .csv
There's example of PSD at doc fft % illustrates computation and how to get the frequency

10年弱前 | 0

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How to sum up different values of a matrix?
doc arrayfun % and hide the looping construct (but it's still there) *ADDENDUM* Actually, "what was I thinking?" :) B...

10年弱前 | 0

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I a having an issue with correcting the magnitude of a FFT. The code runs but the corrected magnitude value shows as zero for all frequencies.
for i = f(1:nfft/2+1) doesn't do what you want it to...use the debugger to step thru and see what happens here and thru th...

10年弱前 | 0

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Basic Question: How to index into table by a text column
Presuming you used the names when creating the table, index by the desired name values-- <http://www.mathworks.com/help/matla...

10年弱前 | 0

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[GUI] How do I create a Push Button like "File", that allows me to get more Push Button like "Open", "Save", "Save as", and "Exit"?
Use *uimenu* instead of pushbuttons...

10年弱前 | 1

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what is an accurate function for linear regression?
Which Toolboxen do you have? There's *fit* in the Curve Fitting TB and *LinearModel.fit* in the Statistics Toolbox. *polyfit* ...

10年弱前 | 1

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How do you find the mean and standard deviation for the current and power?
i_max=2; Max current isn't 2; the current distribution was given an normal(0,2).

10年弱前 | 0

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Make a plot using value from a certain line of matrix
# plot(Y(:,5)) # clabel(C,h,[v(1) v(end)])

10年弱前 | 0

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Why does signal still contain a large number of spikes after FFT
Well, if your original signal is full of a large number of frequency components, the spectrum will be, too. This looks like a f...

10年弱前 | 0

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Why my var6 appear divide by 1000?
You've not showed use the display in question, but more than likely it's simply the Matlab logic to display widely disparate val...

10年弱前 | 0

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copy matrix and random it's value within certain range
Bmn=2; Bmx=4; % ranges for B ix=iswithin(B,Bmn,Bmx); % rule for positions C(ix)=(ra...

10年弱前 | 0

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Obtaining amplitude values from an FFT
If have Signal Processing toolbox, see doc findpeaks Otherwise, peaks cannot be found easily simply by comparing values....

10年弱前 | 0

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loops and xlsread.
A=[[0.5:0.5:21[ 22:35]; % use colon; recommend using the "Getting Started" tutorials See the FAQ <http://matlab.wikia.com...

10年弱前 | 0

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Undefined function 'IndicatorsCalculus' for input arguments of type 'double'
'IndicatorsCalculus' ~= ‘IndicatorCalculus’

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How to locating the linear segment of a curve data and calculate the slope and interception?
Well, cleaning up the dataset does help at least some...it's pretty flimsy test and probably not at all robust, but you might st...

10年弱前 | 0

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Directory for File Exchange
Stephen answered the basic question; I'll point out that I (and I expect most experienced users) keep a specific "Utilities" dir...

10年弱前 | 1

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Using a for loop to change a matrix
Given a function that returns the vector of areas given the node and coordinate arrays, then ix=triArea(nodes,coordinates)<...

10年弱前 | 0

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How to let the data transfer into logarithmic formal?
data(:,3)=log(data(:,2)); % natural log data(:,3)=log10(data(:,2)); % base 10 log take your pick...

10年弱前 | 0

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Add Whitespace to Plot
If I understand the issue, use the _'position'_ property and reduce the width value from its default to something less...that sh...

10年弱前 | 0

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Extract x and y coordinates for points in a multivariable function
Given a z [i,j]=find(z); % indices for lookup into x,y

10年弱前 | 0

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Converting Time Intervals into seconds
I don't have recent release so can't use *datetime* class, but *datenum* returns time in days and fractions thereof. Simply con...

10年弱前 | 0

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Problem with solving equation with 'FSOLVE'
Don't blame *fsolve*; the issue is you're providing solution points as initial guesses that aren't feasible for the system equat...

10年弱前 | 1

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Renaming a file the same as a variable
As written, just movefile('Original.txt', [x '.txt']) More general and where you were probably trying to head would be so...

10年弱前 | 0

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"Assignment has more non-singleton rhs dimensions than non-singleton subscripts" error
_"...colored but i turn them in gray"_ But you didn't do that in the loop where you try to build the array, only in the first...

10年弱前 | 0

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How to sum different functions
Your textbook problem is specific to a given geometry; is the problem you wish to solve the same one exactly or are you looking ...

10年弱前 | 0

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Use data from excel, input them into an equation in matlab that creates the points to be plotted in Matlab
_"...i have to put the xls file in the matlab folder I am working with..."_ No, not really; you simply have to provide a full...

10年弱前 | 0

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Extract same columns from multiple excel files
Several things-- # *xlsread* only will handle one range expression per call # _data_ is a single variable so each pass thru ...

10年弱前 | 1

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Put pi in tick label for 2012
The TeX interpreter isn't enabled for 'X|Y|ZTick' labels yet in R2012, sorry. You can write them with *text* if desired. *AD...

10年弱前 | 0

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Adding log-linear trend to scatterplot
Fit the log(y), compute the fitted result and add... b=polyfit(data1,log(data2),1); % ln y = mx + b yhat=exp(polyval(da...

10年弱前 | 0

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I am not getting correct answer of following hexadecimal addition and sustraction
Oh, I think you're getting the correct answer, you just didn't write the code for the desired problem! :) k=num2str(dec2he...

10年弱前 | 0