How to find the area from a Positive and negative signal plot

Facing problem to find the positive and negative signal area.

1. want to find the how many signals has in the positive and negative area seperately. Suppose, for first negative area showing in the plot it might be 46525 discrete signals. but its difficult to find manually everytime. Is there any way ? I can find the the positive and negative discret values only. But want to find positive and negative area seperately. Marked the 7 areas in the attched figure.
2. attached the signal file in xlsx format and a figure of the plot,as the mat file storage is high. Tried with the below mentioned code, but can't proceed more.

clear all;

clc;

A= readmatrix('Data.xlsx');

t=1:length(A);

time=t';

power=A(1:end,:);

zci = @(v) find(v(:).*circshift(v(:), [-1 0]) <= 0); % Returns Zero-Crossing Indices Of Argument Vector

zeroaxes = zci(power);

gt0 = power>0;

posareaonly = cumtrapz(time(gt0), power(gt0));

negareaonly = cumtrapz(time(~gt0), power(~gt0));

Answer 1

[KSSV]

A = readmatrix('Data.xlsx');
t = (1:length(A))' ;
% Positive Area
Ap = A ;
Ap(A<=0) = 0 ; 
trapz(t,Ap)

[Arif Hoq]

Actually want to find the positive and negative area(marked area attached in the figure) seperately. Later will calculate how many numericals values exist in every marked areas.

[Arif Hoq]

Found the Positive and negative area. Now is there any syntax to find the signal values in every area ? Let's imagine first area(Negative) has 65000 signal values with respect to time. how to find that values?

[Arif Hoq]

used this Code:

clear all;

clc;

A = readmatrix('Data.xlsx');

t = (1:length(A))' ;

% Positive Area

Ap = A ;

Ap(A<=0) = 0 ;

B=trapz(t,Ap);

% Negative Area

An=A;

An(A>=0) = 0 ;

C=trapz(t,An);

subplot(2,1,1);

plot(Ap);

subplot(2,1,2);

plot(An);

Answer 2

[Image Analyst]

To count number of positive and negative regions:

[labeledRegionsPos, numPositive] = bwlabel(power > 0);
[labeledRegionsNeg, numNegative] = bwlabel(power < 0);

Requires bwlabel() which is in the Image Processing Toolbox.

[Arif Hoq]

thank you so much. sorry to say i dont have Image Processing Toolbox. working with Electrical tools.

[Image Analyst]

Perhaps findgroups() could be used similarly.

[Arif Hoq]

showing error in findgroups(). i can use "trapz" fucntion. but can not able to determine the spacing between Data vector (Variable A in my code).

[Image Analyst]

trapz integrates the area under the curve. It does not count the areas like you asked for: "want to find the how many signals"

[Arif Hoq]

i might be wrong on my question. my question was close to integration i guess. I apologize for this inconvenience. I have solved this issue anyway by using trapz.

if i get the area of positive and neagtive, it shows the way to find the signal number as well as data value.thank you very much.