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count how many pixel has value 255 in an image
data=GrayImage==255; total_pix=sum(data(:))

6 meses ago | 1

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Answered
How to open .raw extension image file in matlab?
Try with hdrread function MATLAB Docs

6 meses ago | 0

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Answered
ploting between infected pepole and reproduction number
plot(dx,R0);

6 meses ago | 0

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Answered
Interpolation of 2 sea temperature time series at different depths to create a 3d figure of time on the x-axis, depth on the y-axis, and temperature on the z-axis.
surf may help you. https://in.mathworks.com/help/matlab/ref/surf.html

6 meses ago | 0

Answered
I am new on MATLAB.....How to write this equation in the form of code in MATLAB? I have to find du/dt using euler's method
Please refer the below link (MATLAB Doc) https://in.mathworks.com/help/matlab/math/partial-differential-equations.html

6 meses ago | 0

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How can I establish a logical expression from given truth table using MATLAB?
#For Matrix Multiplication out=A*B+C'*B'; #For Array Multiplication out=A*.B+C'*.B';

6 meses ago | 0

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How to select framework of an image?
You can consider a frame of selection, force remaining pixels to black(0) or white(255), let's suppose data is a gray image- d...

6 meses ago | 0

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How to plot the matrix values in the form of a slice plane?
Please refer the surf plot, and change the plot properties accordingly. https://in.mathworks.com/help/matlab/ref/surf.html

6 meses ago | 0

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Why do I get the error ' Unrecognized function or variable A'?
You have to pass the input arguments to the function. Please refer the following link to understand "How to the call function"...

6 meses ago | 0

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Importing and RGB image to matlab in the form image L(x,y)=[LR(x,y),LG(x,y),LB(x,y)]
LR=L(:,:,1); % First Slice: Red Component LG=L(:,:,2); % Second Slice: Green Component LB=L(:,:,3); % Third Slice: Blue Compon...

6 meses ago | 1

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RGBto XYZ CIE 1931 Code
Here CIE_image=rgb2xyz(RGB_image); Matlab Doc: Here

7 meses ago | 0

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Answered
how to save a figure plotted with matlab with best quality in .ppt or .pdf file?
One way: https://in.mathworks.com/help/matlab/creating_plots/save-figure-at-specific-size-and-resolution.html

7 meses ago | 0

Answered
I want to divide every column element . for example 1nd element with 2nd then 2nd with 3rd and so on
#data is a column/row vector data1=circshift(data,[0 -1]); temp=data./data1; #Ignoring last element, as devide present by nex...

7 meses ago | 0

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Answered
How can I plot a reverse x-axis on the same graph?
#Convert to strings x=[0 1 2 3 4 3 2 1 0]; y = 2*x; plot(y); data=string(x); set(gca,'xtick',1:length(x),'xticklabel',data...

7 meses ago | 0

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Answered
Smoothing a noisy signal
%% how to create a noisy data x = 0:0.1:20; %creating a dummy data y = sin(x); %finding a sine of the variable x n = randn(1,...

7 meses ago | 0

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loading text file in vector columns
May be no file "111.txt" exist in the current working directory. Please check again & confirm? exist('111.txt','file')

7 meses ago | 0

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how to plot different R0 value in single graph
for i=1:length(...) Ro= ..%One data change, which allow to change the Ro, note that it must be an 1D array R=p*b/(b+...

7 meses ago | 0

Answered
Erlang distribution n=50 , m= 5; 6; k= 5; 9
Please set the typical values t=....; m=...; k=....; erlang_dist=t.^(k-1).*exp(-t/m)/(m.^k.*factorial(k-1)); plot(t,erlang...

7 meses ago | 0

Answered
PIXEL counting at grey scaled picture
%Using Histogram (Considering 256 Levels) [counts,binLocations]=imhist(grayImage); pix_counts=sum(counts(200:end)) ## %% 2nd...

7 meses ago | 0

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Answered
Object Segmentation using SegCaps
You can implement on any tool as per your expertise. Here is the complete reference in python (Just the reference) Reference Li...

7 meses ago | 0

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Answered
Adding sprintf values using a loop
Spec =['A%d ','S%d'];

7 meses ago | 0

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Answered
Check numbers in a 5x5 array
Sufficients Hints: #Check all the elements within 1 & 25, use logical statement to avoid loops result=data>=.... & data<=.......

7 meses ago | 0

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How can i put in matrix data into cell array?
Cell array for i=1:length(matrix_data) cell_data{i}=matrix_data; end Detail?

7 meses ago | 2

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Answered
how can i name my output and display it?
#Check Pt array size? Use ; for column vector or use traspose in the table data. T=table(ln,rn,Pt','VariableNames',{'From Bus'...

7 meses ago | 1

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Answered
Average intensity of pixels
#One Way: Segmentation and useing Mask im_original=read the image considering RGB Image im_binary=imbinarize(rgb2gray(im_origi...

7 meses ago | 0

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How to store data in cell array?
Just traspose the cell array, let's data is a cell array then- new_data=data'

7 meses ago | 0

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Plotting average value with max-min area
c_color=['r','m','y']; for i=3:-1:1 p=Cn_range(i,:); plot(p); area(p,'FaceColor',c_color(i)); hold on; end...

8 meses ago | 0

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How can I store user input
There are multiple ways (Any One) Store the r and c variable data in text file or other files, like excel (see save function) ...

8 meses ago | 0

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I need to plot the following script. But it gives an error.
Fw=1./(cos(w*Hs/Vs_soil));

8 meses ago | 2

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how to extract objects from an image after filling in the objects in the binary image
Original BW image BW_result=bwareafilt(BW,2); % Get the largest 2 max size objects result=~(BW_result.*BW); % Nand Logical Op...

9 meses ago | 0