Dots instead of solid lines when plotting corners

Dear Roman,

Roman K said:

I usually can plot a value across corners, and it connects the dots into a line. Right now I just get separate dots. It seems it just plots separate expression for each corner value.

I am not sure, but I suspect you are plotting an expression on the y-axis where the x-axis value is unique to a particular corner. In essence, for each corner the x-axis has a single value. I took the liberty of trying to show you this on a recent corner run I submitted. Figure 1 details the plot I gte if I simply plot an expression - which happens to be the frequency of a VCO over process corners as well as three other variables (temperature, "vc_val", and "vbin_val"). Note that there are only unconnected data points in the plot. This is because at each unique corner there is a single temperature defined. Hence, there are no two corners that are identical in all aspects except temperature. One can change the x-axis of the plot to select a different variable where more than one value of a variable exist for a similar corner and ViVa will produce, by default, a line plot connecting the two or shared corner values. In the case I am showing in Figure 2, two corners are identical except for their value of varaible "vc_val" and hence ViVa connects the two points with a line by default. To change the x-acis, right click your mouse over the x-axis and this will provide the pop-p shown in Figure 3. Selecting as shown in Figure 4 allows you to change the x-axis variable to, in your case, where there are two or more corners defined whose variables are identical except for the value of the variable you select,

I hope I understood your question correctly, Roman, are more importantly this is somwehat useful to you!

Shawn 

Figure 1

Figure 2

Figure 3

Figure 4

Dear Roman,

Roman K said:

I usually can plot a value across corners, and it connects the dots into a line. Right now I just get separate dots. It seems it just plots separate expression for each corner value.

I am not sure, but I suspect you are plotting an expression on the y-axis where the x-axis value is unique to a particular corner. In essence, for each corner the x-axis has a single value. I took the liberty of trying to show you this on a recent corner run I submitted. Figure 1 details the plot I gte if I simply plot an expression - which happens to be the frequency of a VCO over process corners as well as three other variables (temperature, "vc_val", and "vbin_val"). Note that there are only unconnected data points in the plot. This is because at each unique corner there is a single temperature defined. Hence, there are no two corners that are identical in all aspects except temperature. One can change the x-axis of the plot to select a different variable where more than one value of a variable exist for a similar corner and ViVa will produce, by default, a line plot connecting the two or shared corner values. In the case I am showing in Figure 2, two corners are identical except for their value of varaible "vc_val" and hence ViVa connects the two points with a line by default. To change the x-acis, right click your mouse over the x-axis and this will provide the pop-p shown in Figure 3. Selecting as shown in Figure 4 allows you to change the x-axis variable to, in your case, where there are two or more corners defined whose variables are identical except for the value of the variable you select,

I hope I understood your question correctly, Roman, are more importantly this is somwehat useful to you!

Shawn 

Figure 1

Figure 2

Figure 3

Figure 4