Density measurment using cumulative plots

1 visualización (últimos 30 días)
Zuzana Pániková
Zuzana Pániková el 27 de Feb. de 2022
Comentada: Zuzana Pániková el 5 de Mzo. de 2022
I have two plots
plot(a,b)
hold on
plot(c,d)
and now i need do:

Respuesta aceptada

Image Analyst
Image Analyst el 27 de Feb. de 2022
Did you try trapz()?
  3 comentarios
Zuzana Pániková
Zuzana Pániková el 1 de Mzo. de 2022
the trapz() does not work.
this is my graph and i need to calculate:
Image Analyst
Image Analyst el 1 de Mzo. de 2022
You forgot to attach the data and your code.

Iniciar sesión para comentar.

Más respuestas (3)

Zuzana Pániková
Zuzana Pániková el 2 de Mzo. de 2022
a =
0
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
b
b =
11
6
10
11
23
53
97
138
168
166
172
166
173
184
187
197
191
166
136
97
62
43
27
21
c
c =
0
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
d
d =
28
28
24
25
55
167
224
272
299
311
334
348
341
368
378
398
367
357
297
236
181
131
99
49
Fackov_po
Fackov_po =
0 11
1 6
2 10
3 11
4 23
5 53
6 97
7 138
8 168
9 166
10 172
11 166
12 173
13 184
14 187
15 197
16 191
17 166
18 136
19 97
20 62
21 43
22 27
23 21
trapz(b,Fackov_po)
ans =
-2006 160
It is correct?
  1 comentario
Image Analyst
Image Analyst el 2 de Mzo. de 2022
I don't know. What are the two mat files and the xlsx file in the zip file? Which is yRed, yBlue, and the x values?

Iniciar sesión para comentar.


Zuzana Pániková
Zuzana Pániková el 4 de Mzo. de 2022
mat files and xlsx file you don't have to notice, I forgot to delete it.
yRed is d
yBlue is b
x values is a and c.it's the same.
I want to calculate the area between b and d.

Image Analyst
Image Analyst el 4 de Mzo. de 2022
One way is to simply sum the curves and subtract them.
area = abs(sum(d) - sum(b));
That assumes there are no negative values, the curves don't cross, and treats the values like a bar chart (bars with flat tops). If you want to treat them like quadilaterals (like bars but slanted tops), you can use trapz().

Categorías

Más información sobre Numerical Integration and Differentiation en Help Center y File Exchange.

Productos


Versión

R2021b

Community Treasure Hunt

Find the treasures in MATLAB Central and discover how the community can help you!

Start Hunting!

Translated by