Community Profile # joo

28 total contributions since 2012

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Question

matlab correct name of butter
what is the correct term to say that i used the autommatic functions of matlab like butter, filtfilt, linspace. what is the cor...

8 years ago | 1 answer | 0

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Question

copy plots matlab to word
how is the best way to insert plots from matlab to word. if i do copy figure the definition in word is not good (2nd fig). if i ...

8 years ago | 2 answers | 0

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Question

changed to a error code
what happened to my code? what can i do ? please help me. this happened i don't know how <http://i49.tinypic.com/34xri3o.jpg>...

8 years ago | 1 answer | 0

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Question

correct plot3d axis label
<http://i50.tinypic.com/141uwkz.jpg> how can i out the label of the axis x and y parallell to the axis like the label of the ...

8 years ago | 1 answer | 0

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Question

mean of a set of data
if we have the mean of a set of numbers, we can find the standard deviation. is there a command in matlab, ie, a parameter to *c...

8 years ago | 1 answer | 0

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Question

how to do a TRENDLINE (polyfit?how?)
how can i do a trenline like this in matlab <http://i50.tinypic.com/nprtht.jpg> here is the data <http://www.speedyshar...

8 years ago | 2 answers | 0

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Question

mean and standard deviation code
i have 3 2 4 2 3 7 4 2 3 i want the mean 3 (3+2+4 /3) 4 (2+3+7 /3) 3 (4+2+3 /3) and i want the st...

8 years ago | 2 answers | 0

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Question

derivation using command diff
if x is position and t time velocity=diff(x)./(diff(t) acceleration=diff(x,2)./diff(t,2) or diff(x,2)./diff(t) ? ca...

8 years ago | 1 answer | 0

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Question

cutoff freq of butterworth filter
Cutoff frequency is that frequency where the magnitude response of the filter is sqr(1/2). For butter, the normalized cutoff fre...

8 years ago | 2 answers | 0

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Question

butterworth residuals vs cutoff frequency
i need to apply a butterworth filter. to prove my cutoff frequency i need to do a plot ''residuals vs cutoff frequency'' like...

8 years ago | 1 answer | 0

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Question

how to apply butterworth filter
hello, http://www.speedyshare.com/raxKu/a.xlsx this is the data of a gait laboratory analysis. i need to apply a butterwo...

8 years ago | 1 answer | 0

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Question

angle and radius of a curve
i have the xy data (in excel) to obtain the following curve in black (obtained in laboratory) there anyway to obtain the par...

8 years ago | 1 answer | 0

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Question

how to smooth a plot
does anyone know what theory is beyond this use of different smoothOrder numbers? the code does central differences and gets sm...

8 years ago | 1 answer | 0

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Question

formatation of a break axis
does anyone know how to do in matlab this type of axis (see red circle) thank you

8 years ago | 1 answer | 0

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Question

change axis of a plot
does anyone know how to do broken axis* ( 0--//---- ) and also how to obligate matlab automatically to write final x value...

8 years ago | 2 answers | 0

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Question

axes problem in a plot
how can i solve the problem of this two images automatically without having to fix the axes range for each plot (i have millions...

8 years ago | 1 answer | 0

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Question

how to obtain a smoother curve
hello everyone. as you can see from the excel file i have 4 columns with data obtained in laboratory (time, x, y, z). ...

8 years ago | 2 answers | 0

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Question

derivate of x y points
hello everyone. i have two rows: x and y points, generated by experimental tests. this data means x,y positions. i would l...

8 years ago | 1 answer | 0

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Question

velocity and acceleration - apply filter
i use this code to obtain the velocity and acceleration from x,t data (by using central differences). but as you can see now...

8 years ago | 1 answer | 0

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Question

error horzcat CAT arguments dimensions
does anyone understand why am i getting this error: _??? Error using ==> horzcat CAT arguments dimensions are not consistent...

8 years ago | 1 answer | 0

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Question

code to obtain better curves
I am new with matlab and i am having this following problem. i have a little noise on my plots. I need to smooth the curves. ...

8 years ago | 2 answers | 0

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Question

matlab determine a curve
Imagine i have an original plot with superimposed '8' shape curves (the curves are all different but similar to the '8' shape). ...

8 years ago | 2 answers | 0

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Question

determine a point curve
i have a vector with the x points, and another with the y points. could anyone help me with the matlab code for the following...

8 years ago | 1 answer | 0

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Question

obtain a better curve
http://tinypic.com/r/2nbxcw6/6 i have the x,y data of each plot. i need to make the curves smoother. any idea of what i shoul...

8 years ago | 1 answer | 0

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Question

matlab plot 2 vectors
hello! i have X and Y data. if i plot it i get an open curve, but want to obtain a closed curve and so i do XX=[X(end) X...

8 years ago | 2 answers | 0

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Question

construct vectors if cycle
hello! i need to construct vectors xx and yy. The problem is that at each cycle the past xx and yy is deleted but i want...

8 years ago | 1 answer | 0

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Question

matlab concatenate vectors if cycle
distances = sqrt((x - max(x)).^2 + (y - max(y)).^2); [peaks, iPeaks] = findpeaks(distances);%to find out where the curve t...

8 years ago | 1 answer | 0