Applying a function to the values in a table

2022 5 15
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更新时间：2022 5 15
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I have this function where standard_time and E are part of a table. I want to create a new column from this function as such.
T.solar_time = calc_solar_time(T.standard_time, L_st, L_loc, T.E);
function solar_time = calc_solar_time(standard_time, L_st, L_loc, E)
if standard_time == 0
solar_time = 24 * 60 + 4 * (L_st - L_loc) + E;
else
solar_time = 4 * (L_st - L_loc) + E;
end
end
The function acts as if its written like below. As in it just uses the solar_time definition which it reaches the first time.
function solar_time = calc_solar_time(standard_time, L_st, L_loc, E)
solar_time = 4 * (L_st - L_loc) + E;
end
L_st and L_loc are constants.
The table is like this.. https://www.hizliresim.com/6amb7qx

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 采纳的回答

Walter Roberson
Walter Roberson 2022-5-15

1 个投票

T.solar_time = calc_solar_time(T.standard_time, L_st, L_loc, T.E);
That is passing in all entries from the table at the same time.
You have three major choices:
  • rewrite your function to use logical indexing
  • rewrite your function to loop
  • change the way you call your function to call it using arrayfun()

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Thnak you, I thınk I'll just use loops
Walter Roberson
Walter Roberson 2022-5-15
Logical indexing is what I would recommend.
Thank you, I just learned about them. Makes the code look really neat.

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