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dpb


3,932 2012 年以降の合計貢献数

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limits are too large
K>> format short K>> sum(X(:)>1E100)/numel(X) ans = 0.8499 K>> sum(X(:)>1E200)/numel(X) ans = 0.7848 K>> sum(X(:)...

1日 前 | 0

質問


regexrep for the neophyte
How to write expression to find and convert financial strings written with comma separator to be able to parse numerically? Exa...

2日 前 | 1 件の回答 | 0

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Brain freeze re: grouping and recombination
Have two files of correlated data via a categorical variable -- in the first, the name field has been normalized such that can f...

5日 前 | 0 件の回答 | 0

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while/for loop
"know i have to use a for or while loop..." Not with Matlab, no! Use Logical indexing (link) as illustrated...

5日 前 | 0

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Reading a csv file
You started off well w/ the readtable route...but, once you've got the table, then use the variables there, don't create new one...

6日 前 | 1

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computing second derivative from txt/csv file based on existing excel algorithm
Here's perfect example why Matlab excels over Excel... :) txyz=importdata('B0264_dollyo_air_P_T01 rtoe.txt',',',8); % read the...

6日 前 | 0

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How can I save a word e.g. 'apple' in a text file, without matlab separating every letter with a comma?
You undoubtedly use csvwrite or similar to write a character array -- internally a char() array is just that--an array of number...

8日 前 | 1

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how to add a matrix element in a fzero function
As you wrote it, the function is the literal text including the argument so nothing ever gets substituted for dynamically--one w...

8日 前 | 0

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How to find intersection point of two curves, when the intersection point is not there in data sets?
Both intersection sections appear to be straight lines; fit them and use fzero to find the point bblue=polyfit(xblue,yblue,1); ...

8日 前 | 0

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second degree polynomial regression and all the coefficients
Higher order polynomials aren't going to help here...the following code generated the figure: for i=3:9 subplot(4,2,i-2); ...

8日 前 | 0

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code for computing the pvalue
fnP=@(a,i) (sum(a(i)>a(1:i))+0.5*sum(a(i)==a(1:i)))/i; >> for i=2:numel(Si),fnP(Si,i),end ans = 0.75 ans = ...

12日 前 | 1

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How to change values of x axis from numbers to dates
x = -10:0.1:10; y = sin(x); hF=figure; % keep handle to figure plot(x,y) hAx(1)=gca; ...

12日 前 | 1

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Correlating Two Arrays Using Correcoef
There's at least one NaN in the second variable...you don't give any information about which is which. >> spd=5*rand(500,1);tlt...

13日 前 | 0

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second degree polynomial regression and all the coefficients
Taking a shot that the presumption earlier is the correct one-- xy=xlsread('ML.xlsx','sheet2'); % read the data into array ...

14日 前 | 0

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Writing first and last line of each cell
Just have to handle the special case outside the loop... xx=zeros(length(xxMM)+1,6); xx(1,:)=xxMM{1,:}(1,:); for i=1:length(x...

15日 前 | 0

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Plotting graph of negative values of array in integral2 with 3 variables
The functional is invariant upon the the loop; remove the definition from inside the loop Use meaningful name for the degrees a...

15日 前 | 1

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Finding pythagoras triples when only c is known
Somewhat more rudimentary would be UP=fix(sqrt(Csq-1)); % can't be bigger ignoring degenerate case of (sqrt(Csq^2),0) for i=1:...

15日 前 | 1

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Plot A Graph With Asymptotic Behavior
ymaxCX = max(max(CX), limCSss); yminCX = min(min(CX), limCSss); Just getting an overall min/max value of the data in vector C...

16日 前 | 0

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I need to classify my result in catagories
N=1.5*ones(size(ma)); N(abs(ma)==45 | abs(ma)==135)=-0.5; ... The rest should be self-evident from the above; lett as "exerci...

16日 前 | 0

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Getting the correct y-intercept and gradient for a trend line using 'fit'
Looks quite right to me...the intercept is where the fitted line will cross (intercept) the y-axis at x=0...that point is way an...

16日 前 | 0

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How to add a column to an existing file?
Text sequential files are, well, "sequential" You can't just add in the middle by either column or line/record. data=importdat...

17日 前 | 2

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is it possible to copy a file on itself?
That isn't copying a file onto itself; there's nothing to prevent you doing what you want. Your copyfile command isn't referenc...

17日 前 | 0

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Ploting every n-th result in a for loop
v=2;L=100; N=10; for t=0:0.01*N/v:L/v clf ... To introduce a 10-fold reduction...

17日 前 | 0

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How can I plot hourly data in the same figure?
Use the features of Matlab to your advantage...granted, it takes some "time in grade!" to learn one's way around! :) As a gene...

17日 前 | 0

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Create a table with Revenue by financial year such as 2017-18
t=readtable('chindamo.xlsx'); % read the input table data t.Code=categorical(t.Code); ...

17日 前 | 0

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I can't delete plot and line in a figure
... p1 = line([xr xr],[0 f(xr)]); line([xr xr],[0 f(xr)]) ... x = [-10 0.01 10]; y = (x-xr).*df(xr)...

19日 前 | 0

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marker size difference between 'plot' and 'scatter' function
Per the documentation, scatter marker size property is marker proportional to area while the line marker property is proportiona...

19日 前 | 0

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How to convert each row of the matrix into a Character array, without using a for command?
Preallocate B may help just tad... Alternatives to loop include B=cellstr(num2str(A)); but what is end purpose for doing the ...

19日 前 | 0

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Black and Grey Bars in Barplot
Need to apply the colormap to something... hAx=subplot(2,2,1); clrs = [0 0 0; 0.9 0.9 0.9]; colormap(hAx,clrs); hB=bar([perc...

19日 前 | 0

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質問


Categorical variable in cell array?
This seems absurdly trivial but I haven't found the right syntax...I was trying to add a categorical variable to a cell array to...

21日 前 | 0 件の回答 | 0

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