Write a script file $($HW$1\_$ex$1.$m$)$ to load input data from:

$$ voltage.txt $($units: afu$)$ and pressure.txt $($units: mmHg$).$ Flip $($reverse the orientation so the peaks are now the troughs$)$ the data in voltage.txt $($make sure you preserve the magnitude of the signal because just taking the inverse will change the amplitude$)$ and then plot the two data files in one graph window with two subplots. Each plot will be vs$.$ time, and sampling frequency fs $=125$ Hz$.$

$$ Now load the file CalciumLVP$\_$Ischemia.txt$.$ The first column consists of calcium data $($units: nano Molar$)$ and second column of simultaneously obtained left ventricular pressure data $($units: mmHg$).$ Plot each of the columns in one graph window with two subplots. Each plot will be vs$.$ time, and sampling frequency fs $=125$ Hz$.$

$$ Plot Calcium vs LVP

$$ Remember, no figures without explanatory comments. What features of the graphs are obvious, can you say anything about the relationship between the two sets of data?