Error ggplot (Error in seq.int(0, to0 - from, by) : 'to' must be finite)

Question

For plotting the data with ggplot2, I have faced with following error. The commands, data and error types are available as following:

require(ggplot2)
require(reshape2)
df <- data.frame(HMn25_30$avg,dt_hmn$dt)

df[3] = c(   "Normal",   "Normal",
             "Normal",
             "Normal",
             "Normal",
             "Normal",
             "Normal",
             "Normal",
             "Normal",
             "Normal",
             "Outlier",
             "Outlier",
             "Outlier",
             "Outlier",
             "Outlier",
             "Outlier",
             "Normal",
             "Outlier",
             "Outlier",
             "Normal",
             "Normal",
             "Outlier",
             "Outlier",
             "Normal",
             "Normal"
)
names(df)[1] <- 'Node 25'
names(df)[3] <-'Results'
df.m <- melt(df, names(df)[2:3], names(df)[1])
df.m$Results <- factor(df.m$Results)
df.m$dt_hmn.dt <- strptime(as.character(df.m$dt_hmn.dt), format = "%Y-%m-%d %H:%M")
p <- ggplot(df.m, aes(x = dt_hmn.dt, y = value, group = variable, color = variable))
p <- p + scale_shape_manual(values=c(27,20))
p <- p + geom_point(aes(shape = Results), cex=13, color= "blue")
p <- p + theme(axis.text.x = element_text(angle = 90, hjust = 1, size=13,color="darkred"))
p <- p + scale_color_manual(values=c("Red"))
p <- p + ylim(-1,8)
p <- p + theme_bw()
p <- p + xlab('Date and Time') 
p <- p + ylab('Temprature') 
p <- p + ggtitle("Temporal Outliers of Node 25 ") + theme(plot.title = element_text(lineheight=3, face="bold", color="black", size=29))
    p

And the data are:

HMn25_30$avg
 [1]  0.280  0.208 -0.264 -0.480 -0.708 -0.714 -0.498 -0.216  0.126  0.574  1.042  1.086  1.820
[14]  4.570  3.808  7.400  5.572  5.402  6.288  4.966  5.180  2.380  4.710  5.366  4.766

dt_hmn$dt
 [1] 9/29/2007 23:00 9/30/2007 0:00  9/30/2007 1:00  9/30/2007 2:00  9/30/2007 3:00 
 [6] 9/30/2007 4:00  9/30/2007 5:00  9/30/2007 6:00  9/30/2007 7:00  9/30/2007 8:00 
[11] 9/30/2007 9:00  9/30/2007 10:00 9/30/2007 11:00 9/30/2007 12:00 9/30/2007 13:00
[16] 9/30/2007 14:00 9/30/2007 15:00 9/30/2007 16:00 9/30/2007 17:00 9/30/2007 18:00
[21] 9/30/2007 19:00 9/30/2007 20:00 9/30/2007 21:00 9/30/2007 22:00 9/30/2007 23:00

I have faced the following error:

Error in seq.int(0, to0 - from, by) : 'to' must be finite

Answer 1

First problem in your code is that format= in striptime() had the wrong argument format - it didn't correspond to actual date format. It should be format = "%m/%d/%Y %H:%M"

df.m$dt_hmn.dt <- strptime(as.character(df.m$dt_hmn.dt), format = "%m/%d/%Y %H:%M")

Next for the ggplot() code - if you set color="blue" for all points in geom_point() you don't need to use scale_color_manual() and also use color=variable inside aes(). For scale_shape_manual() there is no shape 27, changed it to 17.

If you use theme_bw() then other theme() calls should be placed after this line to be sure that theme_bw() won't override your parameters.

ggplot(df.m, aes(x = dt_hmn.dt, y = value, group = variable)) + 
  geom_point(aes(shape = Results), cex=13, color= "blue")+
  scale_shape_manual(values=c(17,20))+
  ylim(-1,8)+
  theme_bw()+
  xlab('Date and Time') +
  ylab('Temprature')+
  ggtitle("Temporal Outliers of Node 25 ") + 
  theme(plot.title = element_text(lineheight=3, face="bold", color="black", size=29))+
  theme(axis.text.x = element_text(angle = 90, hjust = 1, size=13,color="darkred"))