Want to truncate an array

Suppose i have an array of [8.5766662529*10^22; 5.354353982*10^22;5.289634*10^22]. Now i want to truncate the array upto 4 decimal and power will remain same how i will do that?

Answer 1

[Walter Roberson]

format long g
A = [8.5766662529*10^22; 5.354353982*10^22;5.289634*10^22]

A = 3×1

1.0e+00 * 8.5766662529e+22 5.354353982e+22 5.289634e+22

round(A, 4, 'significant')

ans = 3×1

1.0e+00 * 8.577e+22 5.354e+22 5.29e+22

Answer 2

[Star Strider]

There are a few options, including using the vpa function in the Symbolic Math Toolbox, and to use sprintf to display the values, that retain their full precision in the original code.

Another option is to use the format function however there are only a few options with it—

format longE
v = [8.5766662529*10^22; 5.354353982*10^22;5.289634*10^22]

v = 3x1

1.0e+00 * 8.576666252900000e+22 5.354353982000000e+22 5.289634000000001e+22

format shortE
v

v = 3x1

1.0e+00 * 8.5767e+22 5.3544e+22 5.2896e+22

format shortG
v

v = 3x1

1.0e+00 * 8.5767e+22 5.3544e+22 5.2896e+22

.