Sample Time in From Workspace Block

Hello, I have some model that uses temperature data collected for one year. If I use as an input a sinusoidal signal, my output follows the correct model, but, if I put my data signal it does not follow the model. I think that the problem is that my input signal (data and time) has a total length of 9000, but if I try to plot it, it is using just 300 aprox. Is there any way to use the sample time exact that is in my data?

Thank you.