Array-Search-Function

[thomla]

Hi @all,

i try to find out a solution for this problem. I have a text-file, which was transmit in to an array. The array has 6 coulums and a lot of rows. The text-file ends with the string "END". Now i have 6 string-inputs, which i have to compare with every row. Input 1 shows the coulum 1, Input 2 shows the coulum 2 and so on. Now i'll write a vi, what can compare the input with the hole list in the array and find out if there is a hole row equal with the input. A "XX" in the list, means that the input is every time equal!!!

For the better understanding i have the input-text-file and a vi, which generate the array and show it to you.

For example: Input 1 is equal to any string in coulum 1, the you have to compare input 2 in the same line. If it equal to you have to check input 3 with coulum 3 at the the line. If all inuputs a equal it's a goal!

Please help me!

Thanks Thomas

[thomla]

Hi @all,

here is the input-text-file

Thanks Thomas

[Gandalf]

Hi Thomas

Try this....


Rob

[thomla]

Hi Gandalf,

this is a good solution. Thank you! But one question i have to you. It is possible to change this function, that in any case, where in the input file is a "XX" it's a good compare with the input?

For example: Input1: 3A192646 Input2 : XX Input3 : 19 Input 4: XX Input5: 05 Input6 : 10
Array: Row1/c1: 3A192646 row1/c2: 69 row1/c3: 19 row1/c4: 23 row1/c5 05 row1/c5: 10

------> this have to be a hit too

Thanks Thomas

[altenbach]

Well, it seems you just have to compare each row until you found a match or END is reached.

This is easily done in a while loop. The attached example show one possibility )LabVIEW 7.1). Let me know if you have questions.

The loop stops of a row is matched, if END is reached OR if the first element in a row contains an empty string (e.g. if you would read a file with no matching row and the END line missing by accident. It would never stop otherwise). 🙂

(I don't understand what you were trying to to with the sequence structure, so I simplified things).

[thomla]

Hi Altenbach,

the compare-function find out if a hole line is equal to all inputs. But i need a hit if the input is for ex. 25 and in the array is "XX". Look up in the reply in front of your answer.

So i think we have to compare every element with the input or not?

Thanks again!

Thomas

[altenbach]

OK, here's a solution that forces a match for items where the input contains an XX. Is that what you want?

Message Edited by altenbach on 06-10-2005 12:43 AM

[thomla]

Hi altenbach,

yes this is it what i want. But i have make a mistake. i want a hit if in the data-file is an "XX" and the input is any other. But i have one little thing change in your vi and now it works i think.


thanks Thomas

[thomla]

Hi @all again,

it is possible to change the vi in this case, that the loop stops if there is a hit (i think it works) and a output which shows if there is a hit, or there is no hit(boolean).
But the loop stops if the array ends. Do you know. I'll use this vi as sub.vi with 5 Inputs and 1 array input and it should show me if there is a hit or no hit (output=boolean)

I Think it is easy but , if havn't found a goog solution.

Thanks All,

Thomas

[altenbach]

In this case, you only need one match (1D array, not 2D array), one index (not an array), and one boolean (not an array).

The loop should stop if (1) a match is found, (2) END is reached, (3) or the file ends. For case (1) we need to show the first match as 1D array, Hit? = true, and the row index of the found item. In all other cases, the match is an empty array, Hit? = false, and index = -1.

The attached modification should do this just fine. I have changed the input to an array, it seems cleaner (change it back if you want). I also have placed a real number in position 5 as default value to make sure it is ignored because of the XX in the file. The default values should find a hit in column 36 for demonstration.

You still need to make it into a subVI and hook up the terminals. Good luck.