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Butterworth Bandpass filter and discreate fcn
The bilinear approach would be my choice. Also consider the impinvar function. These appear to be the only Signal Processing...

5 days ago | 0

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If clause – if column blank than
Try this instead: if isempty(data_pp.Anxiety_RESP) .

5 days ago | 0

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Plotting amplitude of individual frequencies over time.
The pspectrum function can likely do what you want. Use the 'spectrogram' type and choose the x-axis column that corresponds to...

5 days ago | 0

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fminsearch with matrices help
This might do what you want: x = rand(150,3); % Create Data y = rand(150,3); ...

6 days ago | 0

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Store value of variable computed in ODE Solver at the specified time steps.
There are not enough variables provided to run your code. This is how I would do it: tspan = 0:0.01:10; options = odeset('...

6 days ago | 1

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how to make smooth the vertcat of more vectors
I am not certain what you want, since the posted file is not the same as the posted plot image. Try this: y = readmatrix('c...

6 days ago | 0

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How to print Rsdnrm after fitting?
The ‘Rsdnrm’ output is a scalar double value, and exists in the workspace after lsqcurvefit completes its estimation. Just use ...

6 days ago | 0

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drawcircle function outputs circle or oval by default?
Use: axis('equal') and it magically becomes a circle! See the documentation on axis for details.

6 days ago | 0

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How to find the upper limit of a complex integral
I’ve been working on this for a while. This works, however at some point, fsolve finds undefined values at the intial point, ...

6 days ago | 0

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How to fix my code for ode45
Delete the single quotation marks. This runs without error: f = @(x,y) (9*14^(1/2)*exp(-(2*x)/9)*sin((14^(1/2)*x)/9))/7; [...

6 days ago | 0

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Answered
What is wrong with my code it keeps telling me that i have 'Error: File: labmaterials.m Line: 67 Column: 109 Invalid expression. When calling a function or indexing a variable, use parentheses. Otherwise, check for mismatched delimiters.
The problems are too many to specifically enumerate: Ms(iii)=2/pi*(w1*log*[tan*[acos*[w1/l_vector]]+l_vector/w1]+l_vector*(pi/...

6 days ago | 0

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Plot / Solve system for nontrivial answer. dot operator issue?
Since you wnat a numeric result, use vpasolve instead, wither with an initial value (if you have an idea of what that is) or a r...

7 days ago | 0

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Should I use the absolute value of fast Fourier transform or the conjugate in signal analysis?
Note that the plot is ‘Power Spectral Density’. Power is the square of magnitude. The abs value is the square root of the co...

7 days ago | 0

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How can I solve a problem related to the output argument.
The way I usually deal with this is to define all the outputs as NaN in the beginning of the function. The ones that are assign...

7 days ago | 0

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Matlab on a new computer
First, back up all your user files (including yuour startup.m file if you created one) to a thumb drive or SD chip and transfer ...

7 days ago | 0

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Plotting mean across a graph
Try this: plot(xlim, [1 1]*Ymean, 'r','LineWidth',1.5) The ‘Ymean’ value should be a constant, so it is necessary to plot it ...

7 days ago | 0

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How to get fmincon to work with an ode45?
See: Optimizing a Simulation or Ordinary Differential Equation

7 days ago | 0

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XLabel and YLabel Font Size
The Control System (and System Identification) Toolbox plot functions properties are difficult to change. That can be done, how...

8 days ago | 0

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load x,y
Try this: x = 1:10; y1=[0.5 1.7 1.75 1.9 2 2.1 2.4 2.6 2.7 2.9 ] y2=[0.7 1.8 1.9 2 2.3 2.5 2.7 2.8 2.9 3] save('XYvectors...

8 days ago | 0

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Drawing contour on circle with individual(x,y,z) location spots
Use the contour function. If they are not already gridded (in a regularly-spaced 2D array), use the griddata (or related func...

8 days ago | 0

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How do I plot 3 dimensional function?
Code it, and include the contourf function in your code to produce the plot.

8 days ago | 0

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Printing lines of text from cell array?
One approach: D = {[1 2 3],[4 5 6 7 8 9],[10 11 12 13 14 15 16 17 18 19 20]} for k = 1:numel(D) fprintf(1, [repmat('%d...

8 days ago | 0

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Answered
Signal Analyzer - Unable to view Complex Signal
I am not sure that I understand the problem. The ‘env’ and ‘g’ variables appear in my Workspace (in R2020b). There are sever...

8 days ago | 0

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changing header to csv using writetable
In R2016b, the variable names must be valid MATLAB variable names. (That changed in R2020a, so what you want to do would be per...

9 days ago | 0

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Use Delimiter only once in row when reading .txt files
Try this: C = {'$CM_TIME 11:44 AM' '$CM_OPERATOR Microscope Administrator' '$CM_INSTRUMENT Microscope' '$CM_...

9 days ago | 0

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How to solve ODE (vector of first order equations)?
The numerical ODE solvers pass a time scalar and a vector to the ODE functions they integrate, in that order, so the function mu...

9 days ago | 0

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Bug in patch rendering?
If you do not need the edge lines to be displayed, 'EdgeColor','none' will eliminate all of them in the specific patch call that...

9 days ago | 0

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Plotting a Distribution of Molecules
The erf function is your friend! Specifically: x = linspace(-5, 5); y = gradient(erf(x)) ./ gradient(x); figure plot(x...

9 days ago | 0

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Why my plot doesn't show the line?
If you must use a loop, you need to subscript ‘f1’: f1(i) = 1/(10*i/(c+10)); However a loop is not necessary. Using element-...

10 days ago | 1

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Slope of a plotted function in a specified point.
It would be easier to have your data. Try this: xv = linspace(0, 5); ...

10 days ago | 0

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