it takes only the first value of"number" and the small loop goes on and on

[laborarory]

i want to read each"number" value and compare it with the "numeric" value,but only the first "number" value is read in the loop.how can i make each value to be read and to be compared?

[Matt_K]

You will want to use the history property instead of the value property in order to read all of the values off of the charts. I have attached an example illustrating the technique. In the future, you may wish to post to the regular LabVIEW group (rather than RT) since you will likely get more/faster responses there.