How to Mapping Values

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Ramakrishna Bajaj
Ramakrishna Bajaj 2017-12-1
评论： Ramakrishna Bajaj 2017-12-1
how to map values of (3 to 4) to (1.4 to 4)?
thanks.
  2 个评论
KSSV
KSSV 2017-12-1
An example will help..what do you mean by map?
Ramakrishna Bajaj
Ramakrishna Bajaj 2017-12-1
I am reading values from the sensor and I am getting values from 3.3576 to 4.0811 not exactly approximately.
so I want to scale these values to 1.4 to 4. So that I can do comparison with my data.

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M
M 2017-12-1
Suppose you have :
x=[3.35 3.4 3.8 3.9 4 4.08];
and you want to scale it to the interval [a b]
a=1.4;
b=4;
you can do it like this :
y = (x-min(x))*(b-a)/(max(x)-min(x)) + a;
y =
1.4000 1.5781 3.0027 3.3589 3.7151 4.0000
  1 个评论
Ramakrishna Bajaj
Ramakrishna Bajaj 2017-12-1
what if I am not sure of min and max values? Then how should i deal with this and the values are changing real time.

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