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# David Hill

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1,023 total contributions since 2017

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How to convert each row in a cell array to a (1*n ) double matrix?
a=cell(1,164); for j=1:164 a{j}=[Key{j,1:end}]-48; end

7 days ago | 3

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Error: Inner Matrix Dimension Must Agree
Vd = 0:0.1:0.7; P = ((0.6*Vd)-((Vd*1.5*10^-12).*(exp(38.64*Vd)-1)));%just need a dot (.*) plot(Vd,P)

8 days ago | 1

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How to save figures to pdf or doc document?
https://www.mathworks.com/matlabcentral/fileexchange/71053-figure2pdf

8 days ago | 0

If you have built the data correctly, you access the function by: mld = ra_mld(salt,temp,Z);%dT defaults to 1 Function should ...

8 days ago | 0

Determine the number of y-values less than the number 2.0
y = 2.5 + randn(100,1); a=mean(y); fprintf('the average of this list is %f\n', a); t=nnz(y<2); fprintf('The number of values...

8 days ago | 0

Error: The logical indices contain a true value outside of the array bounds.
function Tgem2 = MaandGem2019(maand19) load data_weer.mat; Tgem2=mean(TG(jaar==2019&maand==maand19)); end

8 days ago | 0

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How to write a function for a certain number of random numbers
function out=randint(N) out=randi(19999,1,N)-10000; end

9 days ago | 1

Generate an array within three loops
count=1; for n=.1:.1:.5 for m=.1:.1:.5 for k=1:5 c(count)=94*2.4^n*.4^m;%1^k is always 1, so it does...

9 days ago | 0

Error:" Output argument "y" (and maybe others) not assigned during call to"
y might never get assigned in your function. What do you want y to be if it doesn't meet any of your conditional statements? Jus...

9 days ago | 1

Box-cox transformation isn't working!?
My understanding is that the boxcox() transformation changes the data into an approximately normal distribution. And the kstest(...

10 days ago | 0

How to get row index which have my text
I assume you loaded your text into a cell. a={'Hi Helo';'How are you mekala';'what are you doing';'where are you going mekala'}...

10 days ago | 0

how to extract a column from table ?
Not sure why you need a table, but convert to matrix, then: [~,idx]=max(sum(y));%idx will give you the column number of the max...

10 days ago | 0

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how is it possible to solve below matlab codes problem?
I was somewhat confused with your question. Hopefully, this helps: for i=1:8784 %one year (hours) if Ppv_N(i,1) > PLoad(...

10 days ago | 0

Problem with if and else and else
if 0.04<=t_1/Do&&t_1/Do<0.05 %need && t_1 = Pd*di/(2*k*Fy); Do = di + 2*t_1; ...

11 days ago | 0

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How do i display all the values of this for loop?
for b = 1:ne c = 0 + (b)*a%remove ; end or c=zeros(1,ne); for b = 1:ne c(b) = 0 + (b)*a%remove ; end display(c);...

11 days ago | 0

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convert binary to array matrix double
a=a-48;

11 days ago | 0

I want to perform a function on the values that are on the even positions of my vector
M(2:2:end)=-1*M(2:2:end);

12 days ago | 0

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I have a problem with plotting a summation equation, Help me!
k=6; f=zeros(1,2*k-7) for i=0:2*k-8 f(i+1)=sqrt((2*k-3)/((3+i)*(2*k-4-i))); end f=cumsum(f); f=f(1:2:end);%x=0,2,4 pl...

13 days ago | 0

a*x^2+b*x+c using "while"
sin and cos are always between -1 and 1. The equation can never equal 0, unless you really are leaving out some important parent...

13 days ago | 0

how to calculate the distance of a lat lon to the coastline?
Technically, you should use spherical trigonometry (great circle path) to determine the shortest distance. The algorithm is not ...

13 days ago | 0

How to write vector form of very large number?
You could always use java BigInteger if you don't have symbolic toolbox. import java.math.* x=BigInteger(99); x=x.pow(99); x...

14 days ago | 0

Convert .rpt to .m file?
https://www.mathworks.com/help/rptgen/ug/generating-matlab-code-from-report-templates.html

15 days ago | 0

I want to count the number of times each event (a, b, c... up until j) occurs, a(t<1 hour) b(1 hour<t<2 hours) c(2 hours<t<3 hours)... up to j( t>9 hours) based on the following sample in order to find the probability of any individual event occuring
If your data is not in a cell array, convert to a cell array. For example: A={'02:47:09';'03:28:26';'13:57:18';'08:58:46';'10:3...

15 days ago | 0

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How to separate each month of this file?
M=cell(1,12); cy=[0,31,59,90,120,151,181,212,243,273,304,334,365]*24; for k=2:13 M{k-1}=yourMatrix(cy(k-1)+1:c(k),:); en...

15 days ago | 1

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Heatmap with log scale axis
Look at: semilogx()

15 days ago | 0

Programming Mathematics logarithm problem
n=1+log(s/E)/log(r/t);

15 days ago | 2

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Law of motion through numerical aproximation
F=@(t)6*sin(4*pi*t-pi/6)-0.5; t=0:.01:10; a=F(t)/.12; v=cumtrapz(a); d=cumtrapz(v); plot(t,d);

15 days ago | 0

Help me fix the code for binary to text translator
You need to decide what the format of your input binary will look like. Will you force the input to be multiples of 8-bits? If y...

15 days ago | 0

Submitted

Shake256
Uses Advance Encryption Standard algorithm from FIBS-197

16 days ago | 2 downloads |