[R] Bubble chart

[ens]

I have a matrix of p-values for for each explanatory variable. Each row is an
area of the response variable and each column is an explanatory variable.

e.g. 
   PSA   pval_DOY pval_PDSIconcurrent pval_PDSIantecedent_annual_average
pval_TMAXanomaly pval_FM100anomaly
1 NC06 0.96747495           0.6092668                         0.53353019       
0.9301115        0.99801334
2 NC04 0.04699659           0.2759152                         0.07024752       
0.6046828        0.03224094
3 NC01 0.71437394           0.9979173                         0.85296024       
0.9977558        0.99833623
4 NC08 0.67315904           0.9970511                         0.51756714       
0.7809994        0.99626038
5 NC07 0.55221280           0.5784208                         0.43975219       
0.3669491        0.34898877
6 NC05 0.52089881           0.7191645                         0.91972153       
0.4487460        0.94922430

I want to create a visual display such that instead of #s for the p-values,
I have a circle sized to represent the size of the p-value.

symbolys() is what I've found to do this, but it isn't clear to me how to
format the input for the function.

Any suggestions? or help? Even a link if someone else has asked the question
and it's been answered would be helpful.

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