Automaticlly converting negative values to 0

Hey. This is my code.

Ex_UpperBar * Ey_UpperBar * image(x_LowerBar,y_LowerBar)
Ex_UpperBar * Ey_UpperBar
ans =
    -1
image(x_LowerBar,y_LowerBar)
ans =
  uint8
   89

but it is giving the Answer:

 Ex_UpperBar*Ey_UpperBar*image(x_LowerBar,y_LowerBar)
ans =
  uint8
   0

It is supposed to return -89. How do i fix it? Thanks

Answer 1

[Sulaymon Eshkabilov]

Use a command int8() or int16() to store your processed data that resolves your task. e.g.: a= -89; b=int8(a)

Answer 2

[Sulaymon Eshkabilov]

uint8 cannot store -89 and thus, 0

Thus, store your data in int8 or better int16.

Answer 3

[Sulaymon Eshkabilov]

Store you data in int8 or int16

[Abad Ch]

it is in uint8 @Sulaymon Eshkabilov

[Walter Roberson]

 int16(Ex_UpperBar)*int16(Ey_UpperBar)*int16(image(x_LowerBar,y_LowerBar))