Star Strider
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14,638 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 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...
3 hours 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); ...
6 hours ago | 0
how can calculate irragular shape volume
Experiment with this approach: F1 = openfig('surfShape.fig'); Surfc = F1.Children.Children; X = Surfc.XData; Y = Surfc.YDat...
7 hours 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...
12 hours ago | 1
Time derivative then partial derivative of symbolic function
Just do: h = diff(g,x); and it works.
13 hours 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...
23 hours 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...
23 hours ago | 0
xlsx reading not taking adate and time
The date and time may be strings. Use the second output as well: [z,s] = xlsread('2019_SysLoad.xlsx'); to return them in ‘s’...
23 hours 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...
1 day ago | 0
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...
1 day 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...
1 day 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...
1 day 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...
1 day 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...
2 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...
2 days ago | 0
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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...
2 days ago | 0
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How to add error bars to a bar graph
See: error bars in bar plot with categories for one example.
2 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) ...
2 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'}...
2 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...
2 days ago | 1
Plot not showing line fully
There may be some problem with the graphics rendering. See if an update to your graphics driver is available. Otherwise, add...
2 days ago | 0
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Complex number to polar form
Use the abs (magnitude) and angle (radian phase angle) functions. The phasor notation for it would be: phasor = [abs(z) ang...
2 days ago | 0
Understanding the FFT documentation
Your understanding essentially equates to my understanding of fft. It produces a ‘two-sided’ Fourier transform with the first v...
3 days ago | 0
Making graph at the every for loop
First, if you are defining each plot in a separate figure, remove the figure call in the loop and put it before the loop. Jus...
3 days ago | 0
How do I add variables into a string within a table?
The only option appears to be to turn the string variable into a char array first: str = "0001336363"; strc = char(str); Out...
3 days ago | 0
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Computing findpeaks along 3-Dimensional matrix
I am guessing here, since I do not have your data. Since findpeaks is going to return vectors for the peaks, locations (and oth...
3 days ago | 0
Fill in a Polar Scatter Plot
Do everything in Cartesian coordinates, although defining the coordinates in terms of and . Then, use pol2cart to create them ...
3 days ago | 0
finding the exact points of Zero crossing using interpolation method
You are plotting the values of the data at the indices that ‘zci’ returns, not the interpolated aero-crossings. It would be b...
3 days ago | 0
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how do i find minimum value of function with matlab?
I agree with you that using the diff function is the appropriate way to begin.
3 days ago | 0
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