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...
ungefär 2 timmar 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...
ungefär 4 timmar ago | 0
Interp1 Error using interp1>reshapeAndSortXandV
I have absolutely no idea what you’re doing. For signal processing applications, use the resample function.
ungefär 8 timmar 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/(...
ungefär 12 timmar ago | 0
| accepted
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...
ungefär 12 timmar 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: ...
ungefär 12 timmar 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 ...
ungefär 12 timmar 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)) .
ungefär 14 timmar ago | 0
| accepted
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...
ungefär 17 timmar ago | 0
| accepted
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 ...
ungefär 18 timmar 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...
en dag 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); ...
en dag ago | 0
| accepted
how can calculate irragular shape volume
Experiment with this approach: F1 = openfig('surfShape.fig'); Surfc = F1.Children.Children; X = Surfc.XData; Y = Surfc.YDat...
en dag 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...
en dag ago | 1
Time derivative then partial derivative of symbolic function
Just do: h = diff(g,x); and it works.
en dag ago | 0
| accepted
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 dagar ago | 0
| accepted
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 dagar 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 dagar ago | 0
| accepted
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 dagar ago | 0
| accepted
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 dagar ago | 0
| accepted
ode with varying constant
Interpolating a time-domain vector in a differential equation is essentially described in the ode45 (and other solvers) document...
2 dagar 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 dagar ago | 0
| accepted
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 dagar 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 dagar 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 dagar ago | 0
| accepted
How to add error bars to a bar graph
See: error bars in bar plot with categories for one example.
3 dagar ago | 0
| accepted
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 dagar 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'}...
3 dagar 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 dagar ago | 1
| accepted
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