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numeric solve issue for an equation involving a logarithm
Didn't see your comment with your code. This works: imax = (n/2)-2; r = zeros(imax,1); syms b for i = 2:imax; ...

13年以上前 | 1

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numeric solve issue for an equation involving a logarithm
If I understand your intent correctly, you're trying to solve the equation r_i = (Log10(b) + b)/2 for b, given a (numeric?...

13年以上前 | 1

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Problem applying fminsearch to piecewise numerical solution genereated by ode45
It looks like you're on the right track. I'm a little suspicious of the use of the variable name |fminsearch| in |sim3Cmdb| a...

13年以上前 | 0

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How can I create a datetick using if statements?
Do you actually want to create a variable that has two states or is this just about how you visualize a time series? If it's th...

13年以上前 | 0

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How to import a particular text file and plot.
By specifying a format string of |'%s'|, you effectively asked |textscan| for a single output. But then you asked to read a str...

13年以上前 | 0

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Finding contents of cell in another one
If I understand your intent correctly, you want every row of |rxn| for which the value in the 5th column is one of values in the...

13年以上前 | 0

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Error ??? Subscript indices must either be real positive integers or logicals.
To get the fourth variable: RUM = V(:,4); The |:| as the first index represents all rows. Given your description of t...

13年以上前 | 0

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regexp question (-.- 4 word minimum)
I know you've already got it working, but |regexp| challenges are always fun. This seems to work... x = regexp(str,'/([\w\...

13年以上前 | 4

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Why is airy(3,1) complex? (No numerical round-off in the complex part)
Looks like a bug in 12a. If you do whos y it shows the class as |double (complex)|, so |isreal| is working properly, bu...

13年以上前 | 0

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Experiences with release 2012b
I've had quite a while to play with it. There was a little reorientation time, but I really like it now. I admit that I have a...

13年以上前 | 1

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iterating values of a vector under conditions
If I understand you correctly, you have a procedure you want to iteratively apply to a vector, but only to the elements of that ...

13年以上前 | 0

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random number generation initial state
Digging through the code, |rng(shuffle)| calls |RandStream.shuffleSeed|. In there you can find a comment: % Create a seed ...

13年以上前 | 1

13年以上前 | 0

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2 questions regarding text() function in a FOR loop for a CURRENT graph.How to define CURRENT graph?
I'm having difficulty finding the problem. This works when I run it. Are you not seeing any numbers on your graph? (You won't...

13年以上前 | 0

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Some basic MATLAB questions
Thank you for your asking such a great question! Matt has basically given you all the info you need for this assignment, but, i...

13年以上前 | 5

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How do I use MLE on a shifted gamma distribution?
Peter is the expert on statistical matters, so I'd take his advice on whether what you're trying to do is a good idea. But here...

13年以上前 | 0

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Solution of complex equation
If you're doing symbolic work in MATLAB, you need <http://www.mathworks.com/products/symbolic/ Symbolic Toolbox> If you want ...

13年以上前 | 0

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Calculate displacement of a mdof sytem with ODE45?
You're definitely on the right track. Write your equations in matrix form My' = -Ky where y is the 8-element vector you describ...

13年以上前 | 0

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Non-linear Simultaneous Fitting/Solution
You can treat this as a least-squares problem with 6 parameters: |a0|, |b0|, |k1|, |t|, |l1|, and |l2|. Then make your objectiv...

13年以上前 | 0

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how to find the number of 1 in a single column?
idx = find(all(bsxfun(@eq,x,y),2)); where |x| is your matrix and |y| is your test vector (eg |y = x(1,:)|, in your example)...

13年以上前 | 0

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obtaining the average value for a data set
It looks like the fourth column is what you want to calculate. If so, this will do the job, assuming that you have the first th...

13年以上前 | 0

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Simultaneously fit multiple data sets -- with one of the fit parameters common between all data sets.
I don't think you're far off. If you have m fits of n parameters each, with one parameter the same across all m fits, then you ...

13年以上前 | 0

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Using e-mail with matlab
From the error message, it looks like your program is called |sendmail|. This is bad, because you're trying to call the |sendma...

13年以上前 | 0

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Add two excel data togather
count = xlsread('file1.xls'); counts = xlsread('file2.xls'); squaredsum = (count + counts).^2; (although from your sc...

13年以上前 | 0

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Required :- A simple piece of code to list the files in a dir and return the select file name as a string.
As Sean suggests, |uigetfile| provides a standard file selection dialog box. Otherwise, you can also use |dir| or |ls| to get a...

13年以上前 | 1

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ODE: equation solution problem
The problem is that the ODE solvers expect a function of two variables (x & y, in your case), but there's only one variable name...

13年以上前 | 0

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how to use the mathmatical constant "e" in conjunction with a vector.
Your problem isn't the |e|, it's that the two parts you're trying to multiply are both vectors, hence you need |.*| instead of |...

13年以上前 | 0

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Trouble Using lsqcurvefit on experimental data
You appear to be using two different definitions of the fitting function. The function you pass to |lsqcurvefit| is f_l_fi...

13年以上前 | 0

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Form of number
It looks as if the table's |ColumnFormat| property is set to |rat|, but that would require setting the property. It looks like ...

13年以上前 | 1

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lsqnonlin problem - Where did I go wrong?
Before trying to do the optimization, try testing your function first: calibration(rand(12,1)) This gives an error (the ...

13年以上前 | 0