How to remove trailling numbers when using the update function (database toolbox)

2023 10 20
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更新时间：2023 10 20
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Hi,
Im using the update function from the database toolboox to update data in an Oracle database
conn = database(env, user, pass)
tablename = 'depth_table';
whereclause = 'where set_id = 1';
p_var = 'depth_p';
d = [1,1,1,1]';
p = table(0.01 * ones(height(d), 1), 'VariableNames', {'depth_p'});
update(conn, tablename, p_var, p, whereclause)
The problem is that the 0.01 value in Matlab becomes 0.010000000003456346 in Oracle (its a simple number field in Oracle). How can I stop this from happening ?
Thank you

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 采纳的回答

Sulaymon Eshkabilov
Sulaymon Eshkabilov 2023-10-20
Ran in:

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Ran in:
Maybe to store data in a single() format instead of double (default in MATLAB), and also, round up the values, e.g.:
t = linspace(0, 2*pi, 10);
t = round(t, 3, 'significant'); % Round to 3 significant digits
ts = single(t);
F = sin(t);
F = round(F, 3, 'significant'); % Round to 3 significant digits
Fs = single(F);
T = array2table(ts');
T.Fun = Fs'
T = 10×2 table
Var1 Fun _____ ________ 0 0 0.698 0.643 1.4 0.985 2.09 0.868 2.79 0.344 3.49 -0.341 4.19 -0.867 4.89 -0.984 5.59 -0.639 6.28 -0.00319

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