Connect correct temperature to another table based on time

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Dion Theunissen
Dion Theunissen 2021-8-4
回答： Peter Perkins 2021-8-5
I want to connect two tables with each other. I have one table A:
A = [13-aug-2020, 14-aug-2020, 15-aug-2020], [13.8, 12.2, 8.5];
B = [14-aug-2020, 14-aug-2020, 13-aug-2020], [155, 203, 200];
Now I want to combine those two tables with each other based on time like this:
B = [14-aug-2020, 14-aug-2020, 13-aug-2020], [155, 203, 200], [12.2, 12.2, 13.8];
Anyone who can help me with this?
I read the tables like this at the moment
clear all; close all; clc;
check = dir('*.xls');
list = [];
for i = 3
opts = spreadsheetImportOptions("NumVariables", 3);
% Specify sheet and range
opts.Sheet = "Sheet1";
opts.DataRange = "A2:C367";
% Specify column names and types
opts.VariableNames = ["Aug2020", "VarName2", "Temp"];
opts.VariableTypes = ["datetime", "double", "double"];
% Specify variable properties
opts = setvaropts(opts, "Aug2020", "InputFormat", "");
% Import the data
weatherYear = readtable("/Users/diontheunissen/Documents/Smart_Driver/RawData/weatherYear.xlsx", opts, "UseExcel", false);
Date = datetime(weatherYear.Aug2020);
weatherYear.Aug2020 = Date;
opts = spreadsheetImportOptions("NumVariables", 10);
% Specify sheet and range
opts.DataRange = "A2:J414";
% Specify column names and types
opts.VariableNames = ["UitgevoerdDoor", "Rapport", "ActiviteitType", "Lat", "Long", "Starttijd", "Duurms", "KilometerstandBegin", "GeredenAfstand", "TotaalVerbruik"];
opts.VariableTypes = ["categorical", "string", "string", "string", "string", "datetime", "double", "double", "double", "double"];
% Specify variable properties
opts = setvaropts(opts, "Rapport", "WhitespaceRule", "preserve");
opts = setvaropts(opts, ["UitgevoerdDoor", "Rapport", "ActiviteitType", "Lat", "Long"], "EmptyFieldRule", "auto");
opts = setvaropts(opts, "Starttijd", "InputFormat", "");
% Import the data
name = fullfile(check(i).folder, check(i).name);
Ritten = readtable(name, opts, "UseExcel", false);
Datum = datetime(Ritten.Starttijd);
Datum.Format = 'dd-MMM-yyy';
Ritten.Starttijd = Datum;
% pos=find(ismember(Datum,Date));
% for m = 1:length(Datum)
% for np = 1:length(Date)
% n = string(Datum(m));
% weatherYear.Temp(n)
% end
% end
end

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采纳的回答

Peter Perkins
Peter Perkins 2021-8-5
Use timetables. It's a one-liner:
>> A = timetable(datetime(["13-aug-2020";"14-aug-2020";"15-aug-2020"]), [13.8; 12.2; 8.5])
A =
3×1 timetable
Time Var1
___________ ____
13-Aug-2020 13.8
14-Aug-2020 12.2
15-Aug-2020 8.5
>> B = timetable(datetime(["14-aug-2020";"14-aug-2020";"13-aug-2020"]), [155; 203; 200])
B =
3×1 timetable
Time Var1
___________ ____
14-Aug-2020 155
14-Aug-2020 203
13-Aug-2020 200
>> join(B,A)
ans =
3×2 timetable
Time Var1_B Var1_A
___________ ______ ______
14-Aug-2020 155 12.2
14-Aug-2020 203 12.2
13-Aug-2020 200 13.8

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