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Data comparison and storing

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Zeus
Zeus 2020-3-28
关闭： MATLAB Answer Bot 2021-8-20
I've created a sensor to take readings daily .
Humidity =
20×1 string array
"34.099045"
"42.425098"
"33.480418"
"35.790796"
"30.370059"
"44.029928"
"49.041827"
"44.980187"
"45.134548"
"40.841782"
<missing>
<missing>
<missing>
<missing>
<missing>
<missing>
<missing>
<missing>
<missing>
<missing>
HumidityTime =
2 24
4 48
7 12
9 36
12 0
14 24
16 48
19 12
21 36
24 0
  5 个评论
显示 3更早的评论
Peng Li
Peng Li 2020-3-29
Again you have 20 rows in humidity data but 10 rows in humidity time. How do they match? If they match by rows, you can use HumidityTime(double(humidity) > 40 & double(humidity) < 50, :) to get the times that humidity meet your defined criterion.
Zeus
Zeus 2020-3-29
so i managed to get them to be equal ,I got rid of the excess <missing> terms by changing my data collection code.
I have tried ur suggestion HumidityTime(double(humidity) > 40 & double(humidity) < 50 and it is not working .Please suggest an alternative
Humidity =
46.8068
42.5006
35.1041
48.0938
45.3460
41.2533
47.9431
37.3616
36.7546
42.3771
HumidityTime =
2 24
4 48
7 12
9 36
12 0
14 24
16 48
19 12
21 36
24 0

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回答（1 个）

Mohammad Sami
Mohammad Sami 2020-3-30
Humidity = str2double(Humidity(~ismissing(Humiditiy)));
lowlimit = 40;
highlimit = 50;
outsidelimit = Humidity > highlimit || Humidity < lowlimit;
alerts = [HumidityTime(outsidelimit,:) Humidity(outsidelimit)];
  2 个评论
Zeus
Zeus 2020-4-19
it gives me this when i run .i need to have nx3 matrix in output (hours minutes Humidity)
Humidity =
NaN
outsidelimit =
logical
0
alerts =
0×2 empty double matrix
Walter Roberson
Walter Roberson 2020-4-20
At the time you get that output, what is the string array that you are starting with ?

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