How to add negative number to the and of rand function

5 次查看(过去 30 天)
Hello I have to generate 5 lines of random numbers and at the end of random numbers I have to add one extra negative number from (-1 to -9) I tried strcat and things like that but I couldn't combine negative and real numbers can You help me please? The code below will create everything what I need but I have to somehow combine them. Result has to be for example. Then I have to send them via serial port to the arduino. I know how to do it but sometimes it showed me error. It works only when i send it as a string. I had it like this i = input('Pu numbers: ', '%s'), fwrite(s,i); and it works but now I have to send those random numbers
if true
1 2 3 4 5 -1
5 8 3 5 9 -2
.
.
.
9 2 4 8 6 -9
end
if true
% for b = 1:9
x = round(rand(1,5)*9);
disp(x)
end
for a = -1:-1:-9
disp (a);
end
end

回答(2 个)

Roger Stafford
Roger Stafford 2016-4-21
编辑:Roger Stafford 2016-4-21
What about
x = [floor(10*rand(1,5)),floor(-9*rand)];
(Note: writing "round(rand(1,5)*9)" makes 0 and 9 half as probable as each of the other integers in between.)
  1 个评论
George Francis
George Francis 2016-4-21
I have to do it separatly and then add the negative numbers. Also the negative numbers can't be random. It has to be in order from -1 to -9.
1 2 3 4 5 -1
4 7 8 9 3 -2
. -3
. -4
1 4 7 8 9 -5
etc.

请先登录,再进行评论。


Renato Agurto
Renato Agurto 2016-4-21
Assuming x is your 9x5 random matrix:
out = [x (-1:-1:-9)'];
is this what you want?
  3 个评论
Renato Agurto
Renato Agurto 2016-4-21
yes, but you have 2 separate for loops. Can you give us an example of x... should it be constantly overwritten or is a big matrix?
George Francis
George Francis 2016-4-22
I don't know how it supposed to look. I thought that I will make in the firts for loop random numbers from 1 to 9 then in another for loop I'll try add negative numbers in order from -1 to -9 and then I will create another for loop with pause which sends this data into serial port one by another.
1 step
1 2 3 4 5
4 7 8 9 3
.
.
1 4 7 8 9
2 step
1 2 3 4 5 -1
4 7 8 9 3 -2
. -3
. -4
1 4 7 8 9 -5
3 step
for p = 1:9
fwrite(serial object, data x);
pause(5);
end

请先登录,再进行评论。

类别

Help CenterFile Exchange 中查找有关 Logical 的更多信息

标签

尚未输入任何标签。

Community Treasure Hunt

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

Start Hunting!

Translated by