I have a problem with plugging values into array variable

Hey everyone.

im trying to get values of a certain variable for 24 hours. i have latitude, longitude, height and time.

my latitude and longitude values are floats (number with decimal, e.g, 34.6796000000000,34.7128980000000,34.7462010000000,34.7794990000000

And the class of the variables that stores them (seperately, i have longitude var and latitude var) is "double"

im trying to plug these into a variable that is an array with 4 dimensions.

variable name is pm25_var(lon,lat,height,time) ("4D-single")

when im trying to plug certain coordinates like this:

firstday = pm25_var(Longitude(25),Latitude(114),1,1:24);

when 25 and 114 are the indexes of the values i want

i get this:

"Index in position 1 is invalid. Array indices must be positive integers or logical values."

how can i use the exact coordinates without rounding it into an integer?

thanks in advance

Answer 1

[Stephen23]

firstday = pm25_var(25,114,1,1:24);

[Ilay Green]

thanks! the answer I get looks like this, so i wondered if it did take the relevant coordinates:

val(:,:,1,15) =

36.6845

Thank you :)

[Walter Roberson]

Remember that MATLAB only automatically collapses trailing dimensions, so when you index a variable at (scalar, scalar, scalar, vector) then the result you get out is going to be 4 dimensional with the first 3 dimensions all singular.

See also squeeze and reshape and permute