Star Strider
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14,646 total contributions since 2012Hic sunt dracones!
PROFESSIONAL: Physician (M.D.): Diplomate of the American Board of Internal Medicine; M.Sc. Biomedical Engineering: Instrumentation, Signal Processing, Control, System Identification, Parameter Estimation
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How to multiply a cylinder function with a rectangularpulse
I have no idea what you want to do or what result you want. This runs without error, however you have to decide if it does wh...
3 hours ago | 0
How can I eliminate numbers with "e" in the transfer function and show them in their long form?
One option: gam=0.5; N=10; wb=0.01; wh=100; if round(gam)==gam, G10=tf('s')^gam; else, k=1:N; wu=sqrt(wh/wb); wkp...
5 hours ago | 0
Interp1 Error using interp1>reshapeAndSortXandV
I have absolutely no idea what you’re doing. For signal processing applications, use the resample function.
10 hours ago | 0
Plot of a numerical integration
Try this: zv = linspace(0, 1); for k = 1:numel(zv) z = zv(k); u_int(k) = integral(@(u) sqrt(u)/((exp(u)/z)-1) + z/(...
13 hours ago | 0
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Delete parts of plotted figures?
Try this: axis equal hold on caca=2*pi(); ang=linspace(0,caca); xp=5*cos(ang); yp=5*sin(ang); circ=[xp;yp]; L1x = lin...
13 hours ago | 0
Getting Empty sym: 0-by-1 when using solve function
First, ‘[M1,M2,M3,M4,M5,]’ do not exist anywhere, so please do not refer to them. Second, the correct syntax for solve is: ...
13 hours ago | 0
Initial and end artifacts after applying digital filter (filtfilt)
In many situations that is caused by the signal having a significant d-c (constant) offset. There are two general ways to deal ...
14 hours ago | 0
Can someone tell me why my graph isn't plotting?
Subscript ‘Cl’ and ‘Cd’ in the loop: Cl(i) = (Fl(i)/(Pd(i)*A)) Cd(i) = (Fd(i)/(Pd(i)*A)) .
15 hours ago | 0
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Plot Solid Positive-Valued/Dashed Negative-Valued Contour Plot
The contour function itself cannot do that, however it is srtaightforward to adapt it: [X,Y,Z] = peaks; figure hold on [C...
18 hours ago | 0
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plot cdf and calculate 90th percentile value
To plot the dashed lines at the appropriate percentiles: pctl = [50 90]; pctlv = prctile(z_cdf,[50 90]); % answer is 30.9361 ...
19 hours ago | 0
How to find the slope of the tangent on the graph at X=0 and Y=0 for the given current-voltage graph
I am not certain what you want. See if the gradient funciton does what you want. It requires evenly-spaced data with known d...
1 day ago | 0
How to show the plot with the highest value?
One approach would be ‘logical indexing’: h = linspace(0,25); T1 = 20 - h; T2 = 10 + h; Lv = abs(T2) > abs(T1); ...
1 day ago | 0
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how can calculate irragular shape volume
Experiment with this approach: F1 = openfig('surfShape.fig'); Surfc = F1.Children.Children; X = Surfc.XData; Y = Surfc.YDat...
1 day ago | 0
ODE 45 and function combination
I cannot run your code, since I do not have the ‘Tamb’ data. Nevertheless ‘Tamb’ is likely the problem, since it appears to b...
2 days ago | 1
Time derivative then partial derivative of symbolic function
Just do: h = diff(g,x); and it works.
2 days ago | 0
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How can I fix the if statement issue in my code?
Replace the if block with: P_ABP = max(P_ABP,0); P_ACP = max(P_ACP,0); With that, I got no negative values whe I ran your co...
2 days ago | 0
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Why is my findpeaks function not working here?
You likely have significant noise, and hte noise is being detected as peaks. Use the 'MinPeakProminence' name-value pair to ret...
2 days ago | 0
hope to add the graph line, It is basic please help
Create a vector out of the ‘vgs’ quantities you want to plot: vgs=[0.7 1 1.5 2]; then use a second loop to index them: W=40...
2 days ago | 0
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Zero crossings and separation of data
Use the envelope function to define the ‘outline’ of the upper portion of the signal (and the lower portion if you want that), t...
2 days ago | 0
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Issue with velocity signal from measurement
First, if you want to eliminate noise, use a lowpass filter, and if you have a significant amount of baseline offset or baseline...
2 days ago | 0
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ode with varying constant
Interpolating a time-domain vector in a differential equation is essentially described in the ode45 (and other solvers) document...
3 days ago | 0
Calculate shifts/translation between two curves
The blue curve is not ‘shifting’. It has a different scale with respect to the independent variable than the purple curve. The...
3 days ago | 0
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Index exceeds the number of array elements (10).
In this line: A(i)=(x(i+3)-x(i))*((y(i)+3*y(i+1)+3*y(i+2)+y(i+3))/8); ↑ ← HE...
3 days ago | 0
Unable to perform assignment because the left side is 1-by-3 and the right side is 1-by-2
I’m not certain what you’re doing with that line. The standard way of coding it (to put errorbar objects or text objects at t...
3 days ago | 0
| accepted
Why does my code only come out with one result?
Call it as: [siftedData, siftedMean, siftedStd, siftedNorm] = project2(rawData, categories, selectedCategory) and all the ou...
3 days ago | 0
| accepted
How to add error bars to a bar graph
See: error bars in bar plot with categories for one example.
3 days ago | 0
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How do I use an unusual base in a semilogx plot?
See if this works for what you want to do: x = 1:5; y = 1.85.^x; figure subplot(2,1,1) semilogx(x, y) ...
3 days ago | 0
converting abbreviation of months to numerical value
Another approach: mnth_nr = @(mth) find(strcmpi(mth, {'jan','feb','mar','apr','may','jun','jul','aug','sep','oct','nov','dec'}...
4 days ago | 0
How to get upper and lower bounds values from an empirical cumulative distribution?
Using the prctile funciton on ‘cdf_y’ may work to calculate the percentiles (that appear to be what you want). To get the appro...
4 days ago | 1
| accepted
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