Hello,
I'm using PSPP (psppire 0.8.5) on Linux Mint 18.3.
Premise: I'm a big newbie in statistical analysis, so please be patient :)
I have a data set with 23 categorical variables (binary values 0/1) and a
continuous variable. I would like to calculate linear regression, using the
continuous variable as the dependent one, to understand which ones have the
strongest impact.
The syntax that I'm using is:
REGRESSION
/VARIABLES= GLU4 HIS8 HIS21 GLU36 ASP57 LYS60 GLU62 HIS69 ASP75
LYS96 LYS97 ASP98 ASP120 GLU123 ASP125 LYS153 GLU160 ASP166 LYS167 ASP198
ASP217 HIS219 ASP226
/DEPENDENT= Energy
/STATISTICS=COEFF R ANOVA.
When I try to use less than 10 variables, the analysis works, but when I
use all of them I get a lot of Nan:
Model Summary (Energy)
#====#========#=================#==========================#
# R #R Square|Adjusted R Square|Std. Error of the Estimate#
##===#========#=================#==========================#
#|NaN# NaN| NaN| NaN#
##===#========#=================#==========================#
ANOVA (Energy)
#===========#==============#=====#===========#===#====#
# #Sum of Squares| df |Mean Square| F |Sig.#
##==========#==============#=====#===========#===#====#
#|Regression# NaN| 23| NaN|NaN| NaN#
#|Residual # NaN|39976| NaN| | #
#|Total # 499,89|39999| | | #
##==========#==============#=====#===========#===#====#
Coefficients (Energy)
#===========#============================#=========================#===#====#
# # Unstandardized Coefficients|Standardized Coefficients| |
#
#| #-----------+----------------+-------------------------+ |
#
#| # B | Std. Error | Beta | t
|Sig.#
##==========#===========#================#=========================#===#====#
#|(Constant)# NaN| NaN| ,00|NaN|
NaN#
#|GLU4 # NaN| NaN| NaN|NaN|
NaN#
#|HIS8 # NaN| NaN| NaN|NaN|
NaN#
#|HIS21 # NaN| NaN| NaN|NaN|
NaN#
#|GLU36 # NaN| NaN| NaN|NaN|
NaN#
#|ASP57 # NaN| NaN| NaN|NaN|
NaN#
#|LYS60 # NaN| NaN| NaN|NaN|
NaN#
#|GLU62 # NaN| NaN| NaN|NaN|
NaN#
#|HIS69 # NaN| NaN| NaN|NaN|
NaN#
#|ASP75 # NaN| NaN| NaN|NaN|
NaN#
#|LYS96 # -,01| NaN| -,01|NaN|
NaN#
#|LYS97 # ,50| NaN| ,40|NaN|
NaN#
#|ASP98 # ,00| NaN| -,01|NaN|
NaN#
#|ASP120 # ,12| NaN| ,01|NaN|
NaN#
#|GLU123 # ,02| NaN| ,04|NaN|
NaN#
#|ASP125 # ,00| NaN| -,01|NaN|
NaN#
#|LYS153 # ,00| NaN| ,01|NaN|
NaN#
#|GLU160 # -,02| NaN| -,01|NaN|
NaN#
#|ASP166 # -,02| NaN| ,00|NaN|
NaN#
#|LYS167 # ,00| NaN| ,00|NaN|
NaN#
#|ASP198 # ,00| NaN| ,00|NaN|
NaN#
#|ASP217 # -,04| NaN| -,11|NaN|
NaN#
#|HIS219 # ,02| NaN| ,08|NaN|
NaN#
#|ASP226 # ,00| NaN| ,00|NaN|
NaN#
##==========#===========#================#=========================#===#====#
Is there a kind soul amongst you that would explain to me what is going on?
Thank you very much in advance.
Elisa
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