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What to do after getting predicted Yfit from regression learner?
You have the TrainedModel with you.....if you feel the accuracy is satisfactory, validate it. If the validation (for unseen data...

4 years ago | 0

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limits of latitude - longitude
Read about interp2.

4 years ago | 0

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Issue plotting stem function
X=@(t) 3*sin(100*pi*t); t=linspace(0,0.05); % n=linspace(0,0.035); %%This line is trying to match the number of elements in ...

4 years ago | 1

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Transforming 100x4 Char Array to 1x400 Char Array
You have varities of functions to achieve this. Try: str = str(find(~isspace(str))) ; % where str is your string

4 years ago | 0

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Finding area of a graph
Read about the function area

4 years ago | 0

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retrieve data specific date
You need to load the nc data into MATLAB. For this you need to use ncdisp and ncread. You read the dates and convert them into...

4 years ago | 0

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How to plot such a complete figure by matlab. The hemisphere is $x^2+y62+z^2=4$ and the cylinder is $x^2+y^2=1$ with bases $z=0$ and $z=\sqrt{3}$
I would go by parametric equations. %% Sphere R = 2 ; th = linspace(0,2*pi) ; phi = linspace(0,pi/2) ; [T,P] = meshgrid(th...

4 years ago | 0

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how to solve this...when it iterates first 16 char it is not finishing the line it is jumping to next line i need to make a loop that carrying 16 char each iteration?
fid = fopen('shortext.txt','rt'); while ~feof(fid) R1 = fgetl(fid); if length(R1) >= 16 plaintext = R1(1:16...

4 years ago | 0

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Find all unique values and replace it with new values
v = [0.23; 0.1; 0.33; 0.23 ; 0.33; 0.6; 0.6; 0.4]; [c,ia,newV] = unique(v,'stable') ; newV

4 years ago | 2

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count the number of ones in each row
A = [0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 ...

4 years ago | 0

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Hi... I have attached a code with error(Index exceeds matrix dimensions) in line 19. Anyone help me to resolve this error
Your S, E, I, Q, R are constants and you are trying to extract second lement from them. This is the error. May be htis is what y...

4 years ago | 0

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How to do summation columnwise and create the structure array of summed values.
You can achieve it by using reshape and sum. First, reshape your matrix into a 3D matrix and then apply/ do what you want. R...

4 years ago | 0

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Sum and subtract a lot of images
You will get that error, when you try to save more number of elements than the arrays is initialized for. A = zeros(3) ; A(1...

4 years ago | 0

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How to fix Index position 3 exceeds array bounds (must not exceed 1)
This error is simple.. you are trying to extract more number of elements then present. I suspect, you have a black and white ima...

4 years ago | 0

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I am having trouble indexing
A = rand(2,4); B = rand(2,4); [C,idx] = sort(A,'descend'); D=B; for i = 1:size(idx,2) D(:,i) = B(idx(:,i),i) ; end

4 years ago | 0

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How to convert GPS data (lon,lat) data into X, Y (meters)
First, it appears that the values for latitude-longitude in the table have had some sort of scaling or coding applied and will n...

4 years ago | 2

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How to write code for this?
x = rand(100,1) ; y = sqrt(mean(x.^2)-mean(x)^2)

4 years ago | 0

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Getting row id of data
Let T be your table. And you want to seperate Astoria from T into another table T1. idx = strcmp(T.PickupZone,'Astoria') ; T1...

4 years ago | 0

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How can I execute the level enclosed between the two required functions in the plot?
x = linspace(-1,2) ; f1 = @(x) (x.^2-2*x+2) ; f2 = @(x) -x.^2+6 ; y1 = f1(x) ; y2 = f2(x) ; plot(x,y1,x,y2)

4 years ago | 1

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Color of surf function
mymap = [1 0 0];

4 years ago | 0

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Growing eye matrix as per the size of eye
REad about diag I = diag(repelem(1,1,9))+diag(repelem(1,1,6),-3)+diag(repelem(1,1,3),-6)

4 years ago | 1

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how to define the range with variable
You need to use elelement by element (.*) multiplication as well . h_H2 = 0; h_O2 = 0; h_H2O = -241827; s_H2 = 130.59; s_O2...

4 years ago | 0

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power series approximation of the function sin (x)
Hint: Read about syms and taylor

4 years ago | 0

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Output Answer by solve
syms X1 X2 X3 X4 eq1 = X1^2+X2^2==1949.947 ; eq2 = (X1*X3)+(X2*X4)==-28.338; eq3 = (X3*X1)+(X4*X2)==-28.338; eq4 = X3^2==X4^...

4 years ago | 0

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Delete all repeatation number
REad about unique. a = [1 2 2 3 2 4 5 6 7 8 6] iwant = unique(a)

4 years ago | 0

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How to calculate the max value corresponding to every 75 value on a column?
A = rand(1,150000) ; iwant = max(reshape(A,75,[]))' ;

4 years ago | 0

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I have NETCDF files of three hourly soil moisture data of .25 by .25 degrees, I want to convert this data to monthly data of .5*.5 degree.
Read about the function interp2 for changing the spatial resolution. Read about retime to change the temporal resolution. I am...

4 years ago | 0

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How I multiply matrices in a cell?
% Make dummy data for demo C = cell(5,19) ; for i = 1:5 for j = 1:19 C{i,j} = rand(2) ; end end M = @...

4 years ago | 1

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Selecting 2 selected images from dataset for further work ?
Where you have the images? In a single folder? If so: Imgs = dir('*.JPG') ; % you are in the folder of images N = length(Img...

4 years ago | 0

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how to perform curve graph
Read about Bezier Curves. Youmay get the fileexchange here: https://in.mathworks.com/matlabcentral/fileexchange/30759-bezier-c...

4 years ago | 0