abuch06

Thanks guys, I really appreciate all the help! I will definitely use some of this stuff.

i was using textscan in Matlab yea Labview throws an exception before it even begins reading in the file. Can anyone post a screenshot of a VI that would read in that kind of file using the commands in Labview 8.0.1? this is what i have in Matlab fprintf('Working'); totalData = textscan(fid, formatStr, 10000,'delimiter','\t', 'headerlines', startPoint); while ~isempty(totalData{1}) %continue processing until no more data is read for C=1:sizeChannels+1 % across each channel for L=1:max(size(totalData{1,C})) % down each row if C==1 time_counter = time_counter+1; %adds up to find total time of test elseif totalData{C}(L)>outofbounds(C-1) || totalData{C}(L)<(-outofbounds(C-1)) out_of_bounds_matrix{C-1}(1,count(C-1)) = totalData{1}(L); %adds time and value to out of bounds array out_of_bounds_matrix{C-1}(2,count(C-1)) = totalData{C}(L); count(C-1)=count(C-1)+1; end end end fprintf('.'); totalData = textscan(fid,formatStr,10000,'delimiter','\t'); %reads in 10000 pieces at a time end

i tried using the scan file option, but it was really slow... i put it in a for loop for the number of rows. I wanted it to return a 1D array, but it gave me each individual double.

Sorry... i cant post a copy of my vi because my work has some sort of firewall up... Its a tab delimited file and has voltage readings for each channel with respect to the time column. Its just a regular ASCII file, so I can open it up in notepad and read through the data. The problem only occurs with the larger files, because the Read from Measurement File Express VI can only read in relatively small files. The file looks exactly like this, starts with the names of the channels, then moves to data and channels: FAIRING_NOSE FAIR_FWD_BOLT_1ST FAIR_FWD_BOLT_2ND S2_SEPARATION S3_TVC_BATTERY FAIR_BASE_JOINT PAYLOAD_SEP_1ST PAYLOAD_SEP_2ND 0.000000 0.004883 0.000000 0.000000 0.000000 0.000000 0.000000 0.000000 0.000000 0.000200 0.000000 0.000000 0.000000 0.000000 -0.004883 0.000000 0.000000 0.004883 0.000400 -0.004883 -0.004883 -0.004883 -0.004883 0.000000 0.000000 0.000000 0.000000 0.000600 0.000000 0.000000 -0.004883 -0.004883 -0.004883 -0.004883 0.000000 0.000000 0.000800 0.000000 0.000000 0.000000 0.000000 0.000000 0.000000 0.000000 0.000000 0.001000 0.000000 -0.004883 0.000000 0.004883 0.000000 0.000000 0.000000 0.000000 The first column is time in seconds. It goes on for about an hour, so the file ends up being pretty big.

I need to read in files over 1GB and the exress read VI doesn't cut it anymore. The algorithm in MatLab that I used to use to read in files like this worked pretty well; read in 10000 pieces of data, processed, then spit it out. I have the OpenG lib and I tried some of the read data file VI's that are in there, but they all sent out garbage. Where there was supposed to be a zero the VI would return 2.65487E-28 or something like that... The data is not complicated: first column is relative time and the other columns are channels of data. Any suggestions? Thanks...

Thanks! that definitly helps!

whats a typecast node? and where do i find it?

Is there anyway to set array to cluster size programically?

Yea I understand everything that you said... the only problem is that my program can only fix annotations that already exsist. If i click on the graph and "add annotation", then run the program, it works fine. But sometimes I need to add 5, or 10, or 20. It depends on the data I send it. I want the program to read in a number of annotations to create, then create them on its own. I know how to read in the "Annotation List" property and set all of the things available: Name, lable visible, plot # and so on. the program does that fine. AH i just got it... thanks for the help!!

I know that you can add annotations to a waveform graph by right clicking then selecting "add annotation". Right now I have my program identify annotations and place them where I want, but I cannot seem to create them inside the VI. Is this possible? Thanks

I'm having issues all over the place... I think my company put up a block on posting things on the internet, which means I have to somehow find the answer to this problem by explaining it rather than showing you. It's not difficult and I feel retarded about it but I can't figure it out: i can easily explain whats on the vi. its a simple nested for loop with two array feeding into it. one is a time array the other is an array with values for 26 channels at each of those times. inside the for loops the array is indexed and there is a inequality sign checking to see if the value goes over 2. if it does... i want the program to create a seperate 3D array: channel, value, and time. if it doesnt go over 2 then i want the program to disregard the value and continue. simple enough? i tried creating the array inside the case structure after it checks the value... but when the case is false, the tunnel still requires an output. biggest issue: array coming out of the for loop has a different size than the one going in and it needs to be based completely on the values in the array going in and they change everytime on every channel. thanks

Thanks for the help with the graphs... I'm gonna get working on some sort of toggle system. As for the other question, for some reason this forum wont let me post screenshots or vi's... i dont know why. Heres an attempt at copying and pasting a screenshot: if that didnt work... i can easily explain whats on the vi. its a simple integrated for loop with two array feeding into it. one is a time array the other is an array with values for 26 channels at each of those times. inside the for loops the array is indexed and there is a inequality sign checking to see if the value goes over 2. if it does... i want the program to create a seperate 3D array: channel, value, and time. if it doesnt go over 2 then i want the program to disregard the value and continue. simple enough? i tried creating the array inside the case structure after it checks the value... but when the case is false, the tunnel still requires an output. thanks i meant nested not integrated... sorry kinda tired

Thanks for the reply: I'm going to revisit the cursor option; I attempted it once before but got too frustrated (I'm still a total beginner). I tried stacking the plots instead of overlapping them, but I have 26 different channels I need to display, and possible more in the future for this application. I need to be able to view them all together. Is there a way to overlap the graphs 2 at a time and stack the couples? Another question with the program... I need to be able to build an array that cuts out values from a previous array. The previous array is 3D, first two dimensions are channel and values, the 3rd dimension I assigned a 1 to the values I want to keep and a 0 to the ones I want to cut. I cut out the values with a case structure inside a nested for loop but when the case is false it still requires an output. I tried using the "default" output, but that just pads the areas that i want to cut out with zeros... I know there has to be a way to do this, but I'm just not seeing it.

I know that it is possible with waveform graphs... but I need to be able to add some kind of lables to the multiple channels that are displayed on a waveform chart because it's impossible to tell which one is which. Is there any way to do this? if not, any other ideas?

Again! another stupid right click thing... i'll make sure to right click and search through the options before i have a question on something lol thanks again!