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●をクリックすると消えて右と下に分裂する。 | |
左上6マスの白いブロックから●を追い出せ。 | |
参考 | |
バナッハ‐タルスキの密室: 『数学者シャーロック・ホームズ』増補・改題 | |
http://www.amazon.co.jp/dp/4535787409 |
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u <- c() | |
for (i in 1:10000) { | |
j <- sample(data, 10000) | |
u <- c(u, mean(j)) | |
} | |
sqrt(var(u)) #=> 10.06759 | |
quantile(u, c(0.05, 0.95)) | |
#=> 5% 95% |
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set.seed(0) # 同じ値を再現できるようにしておく | |
data <- c( | |
rep( 100000, 10), | |
rep( 10000, 100), | |
rep( 1000, 1000), | |
rep( 100, 10000), | |
rep( 0, 100000 - 11110) | |
) |
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* { | |
margin: 0; | |
padding: 0; | |
border: 0; | |
} | |
body { | |
background: #ddd; | |
font: 30px sans-serif; | |
} |
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* { | |
margin: 0; | |
padding: 0; | |
border: 0; | |
} | |
body { | |
background: #ddd; | |
font: 30px sans-serif; | |
} |
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# plus | |
"%+%" <- function(f, g) { | |
return(paste0("(", f, ") * (", g,")")) | |
} | |
# minus | |
m <- function(f) { | |
paste0( "-(", f, ")" ) | |
} |
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s <- 100 | |
index_h <- 500^(((1:s)-1)/(s-1)) | |
index <- as.integer(c(index_h, rev(index_h))) | |
for (i in 1:length(index)) { | |
png(sprintf("plot_%04d.png", i), width=500, height=500) | |
np <- index[i] | |
n <- 1000 | |
p <- np/n | |
q <- 1 - p | |
x <- 0:n |
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jibanyan_equation <- function(x,y) { | |
min(max(min(1-(x/108)^2-(y/94)^2,y),min(1-((abs(x)-119)/103)^2-((y-56)/86)^2,1-((abs(x)-15)/77)^2-((y-119)/100)^2),1-((abs(x)-42)/66)^2-(y/55)^2,min(55+y,51-abs(x),-y)),3*abs(y-100)-2*(x-75)) * | |
min(min(max(min(1-(x/106)^2-(y/92)^2,y),min(1-((abs(x)-119)/101)^2-((y-56)/84)^2,((abs(x)-99)/40)^2+((y-54)/86)^2-1,92-abs(x)),1-((abs(x)-42)/64)^2-(y/53)^2),min(((abs(x)-52)/26)^2+((y+28)/26)^2-1,((abs(x)-51)/13)^2+(y/13)^2-1,max(abs(x)-51,y))),abs(x/51+10/51*sin(abs(y/61.2)^(1.2)*pi*(7/2)))^(2/3)+abs(y/61.2)^(2/3)-1) * | |
min(1-(x/32)^2-((y+30)/32)^2,1-((abs(x)+5)/22)^2-((y-18)/22)^2) * | |
min(1-((abs(x)-18)/20)^2-((y+10)/20)^2,((abs(x)-20)/22)^2+((y+7)/20)^2-1) * | |
(1-((abs(x)-51)/11)^2-(y/11)^2) | |
} | |
x <- seq(-150, 150, length=400) | |
z <- outer(x,x, Vectorize(jibanyan_equation)) |
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"+" <- function(e1, e2=NA) { | |
if (is.character(e1) & is.character(e2)) { | |
return(paste0(e1, e2)) | |
} | |
ifelse(is.na(e2), base::"+"(e1), base::"+"(e1, e2)) | |
} | |
1+2+3 | |
#=> [1] 6 | |
"f"+"g"+"h" |